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mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-09-04 20:19:47 +08:00
Commit Graph

2795 Commits

Author SHA1 Message Date
wangfushuai
1b8e4091ff docs: proc: update VmFlags documentation in smaps
Remove outdated VM_DENYWRITE("dw") reference and add missing
VM_LOCKONFAULT("lf") and VM_UFFD_MINOR("ui") flags.

[akpm@linux-foundation.org: add "dp" (VM_DROPPABLE), per Tal]
Link: https://lkml.kernel.org/r/20250607153614.81914-1-wangfushuai@baidu.com
Signed-off-by: wangfushuai <wangfushuai@baidu.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mariano Pache <npache@redhat.com>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-06-11 22:42:35 -07:00
Linus Torvalds
522cd6acd2 fourteen smb3 client fixes, most smbdirect related
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Merge tag '6.16-rc-part2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull more smb client updates from Steve French:

 - multichannel/reconnect fixes

 - move smbdirect (smb over RDMA) defines to fs/smb/common so they will
   be able to be used in the future more broadly, and a documentation
   update explaining setting up smbdirect mounts

 - update email address for Paulo

* tag '6.16-rc-part2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal version number
  MAINTAINERS, mailmap: Update Paulo Alcantara's email address
  cifs: add documentation for smbdirect setup
  cifs: do not disable interface polling on failure
  cifs: serialize other channels when query server interfaces is pending
  cifs: deal with the channel loading lag while picking channels
  smb: client: make use of common smbdirect_socket_parameters
  smb: smbdirect: introduce smbdirect_socket_parameters
  smb: client: make use of common smbdirect_socket
  smb: smbdirect: add smbdirect_socket.h
  smb: client: make use of common smbdirect.h
  smb: smbdirect: add smbdirect.h with public structures
  smb: client: make use of common smbdirect_pdu.h
  smb: smbdirect: add smbdirect_pdu.h with protocol definitions
2025-06-08 10:20:21 -07:00
Linus Torvalds
28fb80f089 overlayfs update for 6.16
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Merge tag 'ovl-update-v2-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs

Pull overlayfs update from Miklos Szeredi:

 - Fix a regression in getting the path of an open file (e.g. in
   /proc/PID/maps) for a nested overlayfs setup (André Almeida)

 - Support data-only layers and verity in a user namespace (unprivileged
   composefs use case)

 - Fix a gcc warning (Kees)

 - Cleanups

* tag 'ovl-update-v2-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs:
  ovl: Annotate struct ovl_entry with __counted_by()
  ovl: Replace offsetof() with struct_size() in ovl_stack_free()
  ovl: Replace offsetof() with struct_size() in ovl_cache_entry_new()
  ovl: Check for NULL d_inode() in ovl_dentry_upper()
  ovl: Use str_on_off() helper in ovl_show_options()
  ovl: don't require "metacopy=on" for "verity"
  ovl: relax redirect/metacopy requirements for lower -> data redirect
  ovl: make redirect/metacopy rejection consistent
  ovl: Fix nested backing file paths
2025-06-06 17:54:09 -07:00
Meetakshi Setiya
1c6bbc45d8 cifs: add documentation for smbdirect setup
Document steps to use SMB over RDMA using the linux SMB client and
KSMBD server

Signed-off-by: Meetakshi Setiya <msetiya@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-06-05 10:20:48 -05:00
Linus Torvalds
2619a6d413 fuse update for 6.16
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Merge tag 'fuse-update-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

Pull fuse updates from Miklos Szeredi:

 - Remove tmp page copying in writeback path (Joanne).

   This removes ~300 lines and with that a lot of complexity related to
   avoiding reclaim related deadlock. The old mechanism is replaced with
   a mapping flag that tells the MM not to block reclaim waiting for
   writeback to complete. The MM parts have been reviewed/acked by
   respective maintainers.

 - Convert more code to handle large folios (Joanne). This still just
   adds the code to deal with large folios and does not enable them yet.

 - Allow invalidating all cached lookups atomically (Luis Henriques).
   This feature is useful for CernVMFS, which currently does this
   iteratively.

 - Align write prefaulting in fuse with generic one (Dave Hansen)

 - Fix race causing invalid data to be cached when setting attributes on
   different nodes of a distributed fs (Guang Yuan Wu)

 - Update documentation for passthrough (Chen Linxuan)

 - Add fdinfo about the device number associated with an opened
   /dev/fuse instance (Chen Linxuan)

 - Increase readdir buffer size (Miklos). This depends on a patch to VFS
   readdir code that was already merged through Christians tree.

 - Optimize io-uring request expiration (Joanne)

 - Misc cleanups

* tag 'fuse-update-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: (25 commits)
  fuse: increase readdir buffer size
  readdir: supply dir_context.count as readdir buffer size hint
  fuse: don't allow signals to interrupt getdents copying
  fuse: support large folios for writeback
  fuse: support large folios for readahead
  fuse: support large folios for queued writes
  fuse: support large folios for stores
  fuse: support large folios for symlinks
  fuse: support large folios for folio reads
  fuse: support large folios for writethrough writes
  fuse: refactor fuse_fill_write_pages()
  fuse: support large folios for retrieves
  fuse: support copying large folios
  fs: fuse: add dev id to /dev/fuse fdinfo
  docs: filesystems: add fuse-passthrough.rst
  MAINTAINERS: update filter of FUSE documentation
  fuse: fix race between concurrent setattrs from multiple nodes
  fuse: remove tmp folio for writebacks and internal rb tree
  mm: skip folio reclaim in legacy memcg contexts for deadlockable mappings
  fuse: optimize over-io-uring request expiration check
  ...
2025-06-02 15:31:05 -07:00
Linus Torvalds
0fb34422b5 vfs-6.16-rc1.netfs
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Merge tag 'vfs-6.16-rc1.netfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull netfs updates from Christian Brauner:

 - The main API document has been extensively updated/rewritten

 - Fix an oops in write-retry due to mis-resetting the I/O iterator

 - Fix the recording of transferred bytes for short DIO reads

 - Fix a request's work item to not require a reference, thereby
   avoiding the need to get rid of it in BH/IRQ context

 - Fix waiting and waking to be consistent about the waitqueue used

 - Remove NETFS_SREQ_SEEK_DATA_READ, NETFS_INVALID_WRITE,
   NETFS_ICTX_WRITETHROUGH, NETFS_READ_HOLE_CLEAR,
   NETFS_RREQ_DONT_UNLOCK_FOLIOS, and NETFS_RREQ_BLOCKED

 - Reorder structs to eliminate holes

 - Remove netfs_io_request::ractl

 - Only provide proc_link field if CONFIG_PROC_FS=y

 - Remove folio_queue::marks3

 - Fix undifferentiation of DIO reads from unbuffered reads

* tag 'vfs-6.16-rc1.netfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  netfs: Fix undifferentiation of DIO reads from unbuffered reads
  netfs: Fix wait/wake to be consistent about the waitqueue used
  netfs: Fix the request's work item to not require a ref
  netfs: Fix setting of transferred bytes with short DIO reads
  netfs: Fix oops in write-retry from mis-resetting the subreq iterator
  fs/netfs: remove unused flag NETFS_RREQ_BLOCKED
  fs/netfs: remove unused flag NETFS_RREQ_DONT_UNLOCK_FOLIOS
  folio_queue: remove unused field `marks3`
  fs/netfs: declare field `proc_link` only if CONFIG_PROC_FS=y
  fs/netfs: remove `netfs_io_request.ractl`
  fs/netfs: reorder struct fields to eliminate holes
  fs/netfs: remove unused enum choice NETFS_READ_HOLE_CLEAR
  fs/netfs: remove unused flag NETFS_ICTX_WRITETHROUGH
  fs/netfs: remove unused source NETFS_INVALID_WRITE
  fs/netfs: remove unused flag NETFS_SREQ_SEEK_DATA_READ
2025-06-02 15:04:06 -07:00
Linus Torvalds
7d4e49a77d - The 3 patch series "hung_task: extend blocking task stacktrace dump to
semaphore" from Lance Yang enhances the hung task detector.  The
   detector presently dumps the blocking tasks's stack when it is blocked
   on a mutex.  Lance's series extends this to semaphores.
 
 - The 2 patch series "nilfs2: improve sanity checks in dirty state
   propagation" from Wentao Liang addresses a couple of minor flaws in
   nilfs2.
 
 - The 2 patch series "scripts/gdb: Fixes related to lx_per_cpu()" from
   Illia Ostapyshyn fixes a couple of issues in the gdb scripts.
 
 - The 9 patch series "Support kdump with LUKS encryption by reusing LUKS
   volume keys" from Coiby Xu addresses a usability problem with kdump.
   When the dump device is LUKS-encrypted, the kdump kernel may not have
   the keys to the encrypted filesystem.  A full writeup of this is in the
   series [0/N] cover letter.
 
 - The 2 patch series "sysfs: add counters for lockups and stalls" from
   Max Kellermann adds /sys/kernel/hardlockup_count and
   /sys/kernel/hardlockup_count and /sys/kernel/rcu_stall_count.
 
 - The 3 patch series "fork: Page operation cleanups in the fork code"
   from Pasha Tatashin implements a number of code cleanups in fork.c.
 
 - The 3 patch series "scripts/gdb/symbols: determine KASLR offset on
   s390 during early boot" from Ilya Leoshkevich fixes some s390 issues in
   the gdb scripts.
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Merge tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - "hung_task: extend blocking task stacktrace dump to semaphore" from
   Lance Yang enhances the hung task detector.

   The detector presently dumps the blocking tasks's stack when it is
   blocked on a mutex. Lance's series extends this to semaphores

 - "nilfs2: improve sanity checks in dirty state propagation" from
   Wentao Liang addresses a couple of minor flaws in nilfs2

 - "scripts/gdb: Fixes related to lx_per_cpu()" from Illia Ostapyshyn
   fixes a couple of issues in the gdb scripts

 - "Support kdump with LUKS encryption by reusing LUKS volume keys" from
   Coiby Xu addresses a usability problem with kdump.

   When the dump device is LUKS-encrypted, the kdump kernel may not have
   the keys to the encrypted filesystem. A full writeup of this is in
   the series [0/N] cover letter

 - "sysfs: add counters for lockups and stalls" from Max Kellermann adds
   /sys/kernel/hardlockup_count and /sys/kernel/hardlockup_count and
   /sys/kernel/rcu_stall_count

 - "fork: Page operation cleanups in the fork code" from Pasha Tatashin
   implements a number of code cleanups in fork.c

 - "scripts/gdb/symbols: determine KASLR offset on s390 during early
   boot" from Ilya Leoshkevich fixes some s390 issues in the gdb
   scripts

* tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (67 commits)
  llist: make llist_add_batch() a static inline
  delayacct: remove redundant code and adjust indentation
  squashfs: add optional full compressed block caching
  crash_dump, nvme: select CONFIGFS_FS as built-in
  scripts/gdb/symbols: determine KASLR offset on s390 during early boot
  scripts/gdb/symbols: factor out pagination_off()
  scripts/gdb/symbols: factor out get_vmlinux()
  kernel/panic.c: format kernel-doc comments
  mailmap: update and consolidate Casey Connolly's name and email
  nilfs2: remove wbc->for_reclaim handling
  fork: define a local GFP_VMAP_STACK
  fork: check charging success before zeroing stack
  fork: clean-up naming of vm_stack/vm_struct variables in vmap stacks code
  fork: clean-up ifdef logic around stack allocation
  kernel/rcu/tree_stall: add /sys/kernel/rcu_stall_count
  kernel/watchdog: add /sys/kernel/{hard,soft}lockup_count
  x86/crash: make the page that stores the dm crypt keys inaccessible
  x86/crash: pass dm crypt keys to kdump kernel
  Revert "x86/mm: Remove unused __set_memory_prot()"
  crash_dump: retrieve dm crypt keys in kdump kernel
  ...
2025-05-31 19:12:53 -07:00
Linus Torvalds
0f70f5b08a automount wart removal
Calling conventions of ->d_automount() made saner (flagday change)
 vfs_submount() is gone - its sole remaining user (trace_automount) had
 been switched to saner primitives.
 
 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull automount updates from Al Viro:
 "Automount wart removal

  A bunch of odd boilerplate gone from instances - the reason for
  those was the need to protect the yet-to-be-attched mount from
  mark_mounts_for_expiry() deciding to take it out.

  But that's easy to detect and take care of in mark_mounts_for_expiry()
  itself; no need to have every instance simulate mount being busy by
  grabbing an extra reference to it, with finish_automount() undoing
  that once it attaches that mount.

  Should've done it that way from the very beginning... This is a
  flagday change, thankfully there are very few instances.

  vfs_submount() is gone - its sole remaining user (trace_automount)
  had been switched to saner primitives"

* tag 'pull-automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  kill vfs_submount()
  saner calling conventions for ->d_automount()
2025-05-30 15:38:29 -07:00
Linus Torvalds
d8441523f2 f2fs-for-6.16-rc1
In this round, Matthew converted most of page operations to using folio. Beyond
 the work, we've applied some performance tunings such as GC and linear lookup,
 in addition to enhancing fault injection and sanity checks.
 
 Enhancement:
  - large number of folio conversions
  - add a control to turn on/off the linear lookup for performance
  - tune GC logics for zoned block device
  - improve fault injection and sanity checks
 
 Bug fix:
  - handle error cases of memory donation
  - fix to correct check conditions in f2fs_cross_rename
  - fix to skip f2fs_balance_fs() if checkpoint is disabled
  - don't over-report free space or inodes in statvfs
  - prevent the current section from being selected as a victim during GC
  - fix to calculate first_zoned_segno correctly
  - fix to avoid inconsistence in between SIT and SSA for zoned block device
 
 As usual, there are several debugging patches and clean-ups as well.
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Merge tag 'f2fs-for-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "In this round, Matthew converted most of page operations to using
  folio. Beyond the work, we've applied some performance tunings such as
  GC and linear lookup, in addition to enhancing fault injection and
  sanity checks.

  Enhancements:
   - large number of folio conversions
   - add a control to turn on/off the linear lookup for performance
   - tune GC logics for zoned block device
   - improve fault injection and sanity checks

  Bug fixes:
   - handle error cases of memory donation
   - fix to correct check conditions in f2fs_cross_rename
   - fix to skip f2fs_balance_fs() if checkpoint is disabled
   - don't over-report free space or inodes in statvfs
   - prevent the current section from being selected as a victim during GC
   - fix to calculate first_zoned_segno correctly
   - fix to avoid inconsistence between SIT and SSA for zoned block device

  As usual, there are several debugging patches and clean-ups as well"

* tag 'f2fs-for-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (195 commits)
  f2fs: fix to correct check conditions in f2fs_cross_rename
  f2fs: use d_inode(dentry) cleanup dentry->d_inode
  f2fs: fix to skip f2fs_balance_fs() if checkpoint is disabled
  f2fs: clean up to check bi_status w/ BLK_STS_OK
  f2fs: introduce is_{meta,node}_folio
  f2fs: add ckpt_valid_blocks to the section entry
  f2fs: add a method for calculating the remaining blocks in the current segment in LFS mode.
  f2fs: introduce FAULT_VMALLOC
  f2fs: use vmalloc instead of kvmalloc in .init_{,de}compress_ctx
  f2fs: add f2fs_bug_on() in f2fs_quota_read()
  f2fs: add f2fs_bug_on() to detect potential bug
  f2fs: remove unused sbi argument from checksum functions
  f2fs: fix 32-bits hexademical number in fault injection doc
  f2fs: don't over-report free space or inodes in statvfs
  f2fs: return bool from __write_node_folio
  f2fs: simplify return value handling in f2fs_fsync_node_pages
  f2fs: always unlock the page in f2fs_write_single_data_page
  f2fs: remove wbc->for_reclaim handling
  f2fs: return bool from __f2fs_write_meta_folio
  f2fs: fix to return correct error number in f2fs_sync_node_pages()
  ...
2025-05-30 08:40:25 -07:00
Linus Torvalds
9d230d500b Driver core changes for 6.16-rc1
Here are the driver core / kernfs changes for 6.16-rc1.
 
 Not a huge number of changes this development cycle, here's the summary
 of what is included in here:
   - kernfs locking tweaks, pushing some global locks down into a per-fs
     image lock
   - rust driver core and pci device bindings added for new features.
   - sysfs const work for bin_attributes.  This churn should now be
     completed for those types of attributes
   - auxbus device creation helpers added
   - fauxbus fix for creating sysfs files after the probe completed
     properly
   - other tiny updates for driver core things.
 
 All of these have been in linux-next for over a week with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

Pull driver core updates from Greg KH:
 "Here are the driver core / kernfs changes for 6.16-rc1.

  Not a huge number of changes this development cycle, here's the
  summary of what is included in here:

   - kernfs locking tweaks, pushing some global locks down into a per-fs
     image lock

   - rust driver core and pci device bindings added for new features.

   - sysfs const work for bin_attributes.

     The final churn of switching away from and removing the
     transitional struct members, "read_new", "write_new" and
     "bin_attrs_new" will come after the merge window to avoid
     unnecesary merge conflicts.

   - auxbus device creation helpers added

   - fauxbus fix for creating sysfs files after the probe completed
     properly

   - other tiny updates for driver core things.

  All of these have been in linux-next for over a week with no reported
  issues"

* tag 'driver-core-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core:
  kernfs: Relax constraint in draining guard
  Documentation: embargoed-hardware-issues.rst: Remove myself
  drivers: hv: fix up const issue with vmbus_chan_bin_attrs
  firmware_loader: use SHA-256 library API instead of crypto_shash API
  docs: debugfs: do not recommend debugfs_remove_recursive
  PM: wakeup: Do not expose 4 device wakeup source APIs
  kernfs: switch global kernfs_rename_lock to per-fs lock
  kernfs: switch global kernfs_idr_lock to per-fs lock
  driver core: auxiliary bus: Fix IS_ERR() vs NULL mixup in __devm_auxiliary_device_create()
  sysfs: constify attribute_group::bin_attrs
  sysfs: constify bin_attribute argument of bin_attribute::read/write()
  software node: Correct a OOB check in software_node_get_reference_args()
  devres: simplify devm_kstrdup() using devm_kmemdup()
  platform: replace magic number with macro PLATFORM_DEVID_NONE
  component: do not try to unbind unbound components
  driver core: auxiliary bus: add device creation helpers
  driver core: faux: Add sysfs groups after probing
2025-05-29 09:11:39 -07:00
Linus Torvalds
d87d73895f New ext4 features and performance improvements:
* Fast commit performance improvements
    * Multi-fsblock atomic write support for bigalloc file systems
    * Large folio support for regular files
 
 This last can result in really stupendous performance for the right
 workloads.  For example, see [1] where the Kernel Test Robot reported
 over 37% improvement on a large sequential I/O workload.
 
 [1] https://lore.kernel.org/all/202505161418.ec0d753f-lkp@intel.com/
 
 There are also the usual bug fixes and cleanups.  Of note are cleanups
 of the extent status tree to fix potential races that could result in
 the extent status tree getting corrupted under heavy siulatneous
 allocation and deallocation to a single file.
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Merge tag 'ext4_for_linus-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates from Ted Ts'o:
 "New ext4 features and performance improvements:

   - Fast commit performance improvements

   - Multi-fsblock atomic write support for bigalloc file systems

   - Large folio support for regular files

  This last can result in really stupendous performance for the right
  workloads. For example, see [1] where the Kernel Test Robot reported
  over 37% improvement on a large sequential I/O workload.

  There are also the usual bug fixes and cleanups. Of note are cleanups
  of the extent status tree to fix potential races that could result in
  the extent status tree getting corrupted under heavy simultaneous
  allocation and deallocation to a single file"

Link: https://lore.kernel.org/all/202505161418.ec0d753f-lkp@intel.com/ [1]

* tag 'ext4_for_linus-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (52 commits)
  ext4: Add a WARN_ON_ONCE for querying LAST_IN_LEAF instead
  ext4: Simplify flags in ext4_map_query_blocks()
  ext4: Rename and document EXT4_EX_FILTER to EXT4_EX_QUERY_FILTER
  ext4: Simplify last in leaf check in ext4_map_query_blocks
  ext4: Unwritten to written conversion requires EXT4_EX_NOCACHE
  ext4: only dirty folios when data journaling regular files
  ext4: Add atomic block write documentation
  ext4: Enable support for ext4 multi-fsblock atomic write using bigalloc
  ext4: Add multi-fsblock atomic write support with bigalloc
  ext4: Add support for EXT4_GET_BLOCKS_QUERY_LEAF_BLOCKS
  ext4: Make ext4_meta_trans_blocks() non-static for later use
  ext4: Check if inode uses extents in ext4_inode_can_atomic_write()
  ext4: Document an edge case for overwrites
  jbd2: remove journal_t argument from jbd2_superblock_csum()
  jbd2: remove journal_t argument from jbd2_chksum()
  ext4: remove sb argument from ext4_superblock_csum()
  ext4: remove sbi argument from ext4_chksum()
  ext4: enable large folio for regular file
  ext4: make online defragmentation support large folios
  ext4: make the writeback path support large folios
  ...
2025-05-28 12:12:08 -07:00
Chao Yu
54ca9be0bc f2fs: introduce FAULT_VMALLOC
Introduce a new fault type FAULT_VMALLOC to simulate no memory error in
f2fs_vmalloc().

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2025-05-27 23:52:36 +00:00
Linus Torvalds
3e443d1673 A moderately busy cycle for documentation this time around:
- The most significant change is the replacement of the old kernel-doc
   script (a monstrous collection of Perl regexes that predates the Git era)
   with a Python reimplementation.  That, too, is a horrifying collection of
   regexes, but in a much cleaner and more maintainable structure that
   integrates far better with the Sphinx build system.
 
   This change has been in linux-next for the full 6.15 cycle; the small
   number of problems that turned up have been addressed, seemingly to
   everybody's satisfaction.  The Perl kernel-doc script remains in tree (as
   scripts/kernel-doc.pl) and can be used with a command-line option if need
   be.  Unless some reason to keep it around materializes, it will probably
   go away in 6.17.
 
   Credit goes to Mauro Carvalho Chehab for doing all this work.
 
 - Some RTLA documentation updates
 
 - A handful of Chinese translations
 
 - The usual collection of typo fixes, general updates, etc.
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Merge tag 'docs-6.16' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "A moderately busy cycle for documentation this time around:

   - The most significant change is the replacement of the old
     kernel-doc script (a monstrous collection of Perl regexes that
     predates the Git era) with a Python reimplementation. That, too, is
     a horrifying collection of regexes, but in a much cleaner and more
     maintainable structure that integrates far better with the Sphinx
     build system.

     This change has been in linux-next for the full 6.15 cycle; the
     small number of problems that turned up have been addressed,
     seemingly to everybody's satisfaction. The Perl kernel-doc script
     remains in tree (as scripts/kernel-doc.pl) and can be used with a
     command-line option if need be. Unless some reason to keep it
     around materializes, it will probably go away in 6.17.

     Credit goes to Mauro Carvalho Chehab for doing all this work.

   - Some RTLA documentation updates

   - A handful of Chinese translations

   - The usual collection of typo fixes, general updates, etc"

* tag 'docs-6.16' of git://git.lwn.net/linux: (85 commits)
  Docs: doc-guide: update sphinx.rst Sphinx version number
  docs: doc-guide: clarify latest theme usage
  Documentation/scheduler: Fix typo in sched-stats domain field description
  scripts: kernel-doc: prevent a KeyError when checking output
  docs: kerneldoc.py: simplify exception handling logic
  MAINTAINERS: update linux-doc entry to cover new Python scripts
  docs: align with scripts/syscall.tbl migration
  Documentation: NTB: Fix typo
  Documentation: ioctl-number: Update table intro
  docs: conf.py: drop backward support for old Sphinx versions
  Docs: driver-api/basics: add kobject_event interfaces
  Docs: relay: editing cleanups
  docs: fix "incase" typo in coresight/panic.rst
  Fix spelling error for 'parallel'
  docs: admin-guide: fix typos in reporting-issues.rst
  docs: dmaengine: add explanation for DMA_ASYNC_TX capability
  Documentation: leds: improve readibility of multicolor doc
  docs: fix typo in firmware-related section
  docs: Makefile: Inherit PYTHONPYCACHEPREFIX setting as env variable
  Documentation: ioctl-number: Update outdated submission info
  ...
2025-05-27 11:22:19 -07:00
Linus Torvalds
664a231d90 Carve out the resctrl filesystem-related code into fs/resctrl/ so that
multiple architectures can share the fs API for manipulating their
 respective hw resource control implementation. This is the second step
 in the work towards sharing the resctrl filesystem interface, the next
 one being plugging ARM's MPAM into the aforementioned fs API.
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Merge tag 'x86_cache_for_v6.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 resource control updates from Borislav Petkov:
 "Carve out the resctrl filesystem-related code into fs/resctrl/ so that
  multiple architectures can share the fs API for manipulating their
  respective hw resource control implementation.

  This is the second step in the work towards sharing the resctrl
  filesystem interface, the next one being plugging ARM's MPAM into the
  aforementioned fs API"

* tag 'x86_cache_for_v6.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits)
  MAINTAINERS: Add reviewers for fs/resctrl
  x86,fs/resctrl: Move the resctrl filesystem code to live in /fs/resctrl
  x86/resctrl: Always initialise rid field in rdt_resources_all[]
  x86/resctrl: Relax some asm #includes
  x86/resctrl: Prefer alloc(sizeof(*foo)) idiom in rdt_init_fs_context()
  x86/resctrl: Squelch whitespace anomalies in resctrl core code
  x86/resctrl: Move pseudo lock prototypes to include/linux/resctrl.h
  x86/resctrl: Fix types in resctrl_arch_mon_ctx_{alloc,free}() stubs
  x86/resctrl: Move enum resctrl_event_id to resctrl.h
  x86/resctrl: Move the filesystem bits to headers visible to fs/resctrl
  fs/resctrl: Add boiler plate for external resctrl code
  x86/resctrl: Add 'resctrl' to the title of the resctrl documentation
  x86/resctrl: Split trace.h
  x86/resctrl: Expand the width of domid by replacing mon_data_bits
  x86/resctrl: Add end-marker to the resctrl_event_id enum
  x86/resctrl: Move is_mba_sc() out of core.c
  x86/resctrl: Drop __init/__exit on assorted symbols
  x86/resctrl: Resctrl_exit() teardown resctrl but leave the mount point
  x86/resctrl: Check all domains are offline in resctrl_exit()
  x86/resctrl: Rename resctrl_sched_in() to begin with "resctrl_arch_"
  ...
2025-05-27 09:53:02 -07:00
Linus Torvalds
14f19dc644 fscrypt update for 6.16
Add support for "hardware-wrapped inline encryption keys" to fscrypt.
 When enabled on supported platforms, this feature protects file contents
 keys from certain attacks, such as cold boot attacks.
 
 This feature uses the block layer support for wrapped keys which was
 merged in 6.15.  Wrapped key support has existed out-of-tree in Android
 for a long time, and it's finally ready for upstream now that there is a
 platform on which it works end-to-end with upstream.  Specifically,
 it works on the Qualcomm SM8650 HDK, using the Qualcomm ICE (Inline
 Crypto Engine) and HWKM (Hardware Key Manager).  The corresponding
 driver support is included in the SCSI tree for 6.16.  Validation for
 this feature includes two new tests that were already merged into
 xfstests (generic/368 and generic/369).
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Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/linux

Pull fscrypt update from Eric Biggers:
 "Add support for 'hardware-wrapped inline encryption keys' to fscrypt.

  When enabled on supported platforms, this feature protects file
  contents keys from certain attacks, such as cold boot attacks.

  This feature uses the block layer support for wrapped keys which was
  merged in 6.15. Wrapped key support has existed out-of-tree in Android
  for a long time, and it's finally ready for upstream now that there is
  a platform on which it works end-to-end with upstream.

  Specifically, it works on the Qualcomm SM8650 HDK, using the Qualcomm
  ICE (Inline Crypto Engine) and HWKM (Hardware Key Manager). The
  corresponding driver support is included in the SCSI tree for 6.16.

  Validation for this feature includes two new tests that were already
  merged into xfstests (generic/368 and generic/369)"

* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/linux:
  fscrypt: add support for hardware-wrapped keys
2025-05-26 13:27:40 -07:00
Linus Torvalds
79b98edf91 Changes since last update:
- Add a `fsoffset` mount option to specify the filesystem offset;
 
  - Support Intel QAT accelerators to boost up the DEFLATE algorithm;
 
  - Initialize per-CPU workers and CPU hotplug hooks lazily to avoid
    unnecessary overhead when EROFS is not mounted;
 
  - Fix file handle encoding for 64-bit NIDs;
 
  - Minor cleanups.
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Merge tag 'erofs-for-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

Pull erofs updates from Gao Xiang:
 "In this cycle, Intel QAT hardware accelerators are supported to
  improve DEFLATE decompression performance. I've tested it with the
  enwik9 dataset of 1 MiB pclusters on our Intel Sapphire Rapids
  bare-metal server and a PL0 ESSD, and the sequential read performance
  even surpasses LZ4 software decompression on this setup.

  In addition, a `fsoffset` mount option is introduced for file-backed
  mounts to specify the filesystem offset in order to adapt customized
  container formats.

  And other improvements and minor cleanups. Summary:

   - Add a `fsoffset` mount option to specify the filesystem offset

   - Support Intel QAT accelerators to boost up the DEFLATE algorithm

   - Initialize per-CPU workers and CPU hotplug hooks lazily to avoid
     unnecessary overhead when EROFS is not mounted

   - Fix file handle encoding for 64-bit NIDs

   - Minor cleanups"

* tag 'erofs-for-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: support DEFLATE decompression by using Intel QAT
  erofs: clean up erofs_{init,exit}_sysfs()
  erofs: add 'fsoffset' mount option to specify filesystem offset
  erofs: lazily initialize per-CPU workers and CPU hotplug hooks
  erofs: refine readahead tracepoint
  erofs: avoid using multiple devices with different type
  erofs: fix file handle encoding for 64-bit NIDs
2025-05-26 12:47:41 -07:00
Linus Torvalds
522544fc71 bcachefs updates for 6.16
Lots of changes:
 
 - Poisoned extents can now be moved: this lets us handle bitrotted data
   without deleting it. For now, reading from poisoned extents only
   returns -EIO: in the future we'll have an API for specifying "read
   this data even if there were bitflips".
 
 - Incompatible features may now be enabled at runtime, via
   "opts/version_upgrade" in sysfs. Toggle it to incompatible, and then
   toggle it back - option changes via the sysfs interface are
   persistent.
 
 - Various changes to support deployable disk images:
   - RO mounts now use less memory
   - Images may be stripped of alloc info, particularly useful for
     slimming them down if they will primarily be mounted RO. Alloc info
     will be automatically regenerated on first RW mount, and this is
     quite fast.
   - Filesystem images generated with 'bcachefs image' will be
     automatically resized the first time they're mounted on a larger
     device.
 
     The images 'bcachefs image' generates with compression enabled have
     been comparable in size to those generated by squashfs and erofs -
     but you get a full RW capable filesystem.
 
 - Major error message improvements for btree node reads, data reads,
   and elsewhere. We now build up a single error message that lists all
   the errors encountered, actions taken to repair, and success/failure
   of the IO. This extends to other error paths that may kick off other
   actions, e.g. scheduling recovery passes: actions we took because of
   an error are included in that error message, with grouping/indentation
   so we can see what caused what.
 
 - Repair/self healing:
   - We can now kick off recovery passes and run them in the background
     if we detect errors. Currently, this is just used by code that walks
     backpointers; we now also check for missing backpointers at runtime
     and run check_extents_to_backpointers if required. The messy 6.14
     upgrade left missing backpointers for some users, and this will
     correct that automatically instead of requiring a manual fsck - some
     users noticed this as copygc spinning and not making progress.
 
     In the future, as more recovery passes come online, we'll be able to
     repair and recover from nearly anything - except for unreadable
     btree nodes, and that's why you're using replication, of course -
     without shutting down the filesystem.
 
   - There's a new recovery pass, for checking the rebalance_work btree,
     which tracks extents that rebalance will process later.
 
 - Hardening:
   - Close the last known hole in btree iterator/btree locking
     assertions: path->should_be_locked paths must stay locked until the
     end of the transaction. This shook out a few bugs, including a
     performance issue that was causing unnecessary path_upgrade
     transaction restarts.
 
 - Performance;
   - Faster snapshot deletion: this is an incompatible feature, as it
     requires new sentinal values, for safety. Snapshot deletion no
     longer has to do a full metadata scan, it now just scans the inodes
     btree: if an extent/dirent/xattr is present for a given snapshot ID,
     we already require that an inode be present with that same snapshot
     ID.
 
     If/when users hit scalability limits again (ridiculously huge
     filesystems with lots of inodes, and many sparse snapshots), let me
     know - the next step will be to add an index from snapshot ID ->
     inode number, which won't be too hard.
 
   - Faster device removal: the "scan for pointers to this device" no
     longer does a full metadata scan, instead it walks backpointers.
     Like fast snapshot deletion this is another incompat feature: it
     also requires a new sentinal value, because we don't want to reuse
     these device IDs until after a fsck.
 
   - We're now coalescing redundant accounting updates prior to
     transaction commit, taking some pressure off the journal. Shortly
     we'll also be doing multiple extent updates in a transaction in the
     main write path, which combined with the previous should drastically
     cut down on the amount of metadata updates we have to journal.
 
 - Stack usage improvements: All allocator state has been moved off the
   stack
 
 - Debug improvements:
   - enumerated refcounts: The debug code previously used for filesystem
     write refs is now a small library, and used for other heavily used
     refcounts. Different users of a refcount are enumerated, making it
     much easier to debug refcount issues.
 
   - Async object debugging: There's a new kconfig option that makes
     various async objects (different types of bios, data updates, write
     ops, etc.) visible in debugfs, and it should be fast enough to leave
     on in production.
 
   - Various sets of assertions no longer require CONFIG_BCACHEFS_DEBUG,
     instead they're controlled by module parameters and static keys,
     meaning users won't need to compile custom kernels as often to help
     debug issues.
 
   - bch2_trans_kmalloc() calls can be tracked (there's a new kconfig
     option); with it on you can check the btree_transaction_stats in
     debugfs to see the bch2_trans_kmalloc() calls a transaction did when
     it used the most memory.
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Merge tag 'bcachefs-2025-05-24' of git://evilpiepirate.org/bcachefs

Pull bcachefs updates from Kent Overstreet:

 - Poisoned extents can now be moved: this lets us handle bitrotted data
   without deleting it. For now, reading from poisoned extents only
   returns -EIO: in the future we'll have an API for specifying "read
   this data even if there were bitflips".

 - Incompatible features may now be enabled at runtime, via
   "opts/version_upgrade" in sysfs. Toggle it to incompatible, and then
   toggle it back - option changes via the sysfs interface are
   persistent.

 - Various changes to support deployable disk images:

     - RO mounts now use less memory

     - Images may be stripped of alloc info, particularly useful for
       slimming them down if they will primarily be mounted RO. Alloc
       info will be automatically regenerated on first RW mount, and
       this is quite fast

     - Filesystem images generated with 'bcachefs image' will be
       automatically resized the first time they're mounted on a larger
       device

   The images 'bcachefs image' generates with compression enabled have
   been comparable in size to those generated by squashfs and erofs -
   but you get a full RW capable filesystem

 - Major error message improvements for btree node reads, data reads,
   and elsewhere. We now build up a single error message that lists all
   the errors encountered, actions taken to repair, and success/failure
   of the IO. This extends to other error paths that may kick off other
   actions, e.g. scheduling recovery passes: actions we took because of
   an error are included in that error message, with
   grouping/indentation so we can see what caused what.

 - New option, 'rebalance_on_ac_only'. Does exactly what the name
   suggests, quite handy with background compression.

 - Repair/self healing:

     - We can now kick off recovery passes and run them in the
       background if we detect errors. Currently, this is just used by
       code that walks backpointers. We now also check for missing
       backpointers at runtime and run check_extents_to_backpointers if
       required. The messy 6.14 upgrade left missing backpointers for
       some users, and this will correct that automatically instead of
       requiring a manual fsck - some users noticed this as copygc
       spinning and not making progress.

       In the future, as more recovery passes come online, we'll be able
       to repair and recover from nearly anything - except for
       unreadable btree nodes, and that's why you're using replication,
       of course - without shutting down the filesystem.

     - There's a new recovery pass, for checking the rebalance_work
       btree, which tracks extents that rebalance will process later.

 - Hardening:

     - Close the last known hole in btree iterator/btree locking
       assertions: path->should_be_locked paths must stay locked until
       the end of the transaction. This shook out a few bugs, including
       a performance issue that was causing unnecessary path_upgrade
       transaction restarts.

 - Performance:

     - Faster snapshot deletion: this is an incompatible feature, as it
       requires new sentinal values, for safety. Snapshot deletion no
       longer has to do a full metadata scan, it now just scans the
       inodes btree: if an extent/dirent/xattr is present for a given
       snapshot ID, we already require that an inode be present with
       that same snapshot ID.

       If/when users hit scalability limits again (ridiculously huge
       filesystems with lots of inodes, and many sparse snapshots), let
       me know - the next step will be to add an index from snapshot ID
       -> inode number, which won't be too hard.

     - Faster device removal: the "scan for pointers to this device" no
       longer does a full metadata scan, instead it walks backpointers.
       Like fast snapshot deletion this is another incompat feature: it
       also requires a new sentinal value, because we don't want to
       reuse these device IDs until after a fsck.

     - We're now coalescing redundant accounting updates prior to
       transaction commit, taking some pressure off the journal. Shortly
       we'll also be doing multiple extent updates in a transaction in
       the main write path, which combined with the previous should
       drastically cut down on the amount of metadata updates we have to
       journal.

 - Stack usage improvements: All allocator state has been moved off the
   stack

 - Debug improvements:

     - enumerated refcounts: The debug code previously used for
       filesystem write refs is now a small library, and used for other
       heavily used refcounts. Different users of a refcount are
       enumerated, making it much easier to debug refcount issues.

     - Async object debugging: There's a new kconfig option that makes
       various async objects (different types of bios, data updates,
       write ops, etc.) visible in debugfs, and it should be fast enough
       to leave on in production.

     - Various sets of assertions no longer require
       CONFIG_BCACHEFS_DEBUG, instead they're controlled by module
       parameters and static keys, meaning users won't need to compile
       custom kernels as often to help debug issues.

     - bch2_trans_kmalloc() calls can be tracked (there's a new kconfig
       option). With it on you can check the btree_transaction_stats in
       debugfs to see the bch2_trans_kmalloc() calls a transaction did
       when it used the most memory.

* tag 'bcachefs-2025-05-24' of git://evilpiepirate.org/bcachefs: (218 commits)
  bcachefs: Don't mount bs > ps without TRANSPARENT_HUGEPAGE
  bcachefs: Fix btree_iter_next_node() for new locking asserts
  bcachefs: Ensure we don't use a blacklisted journal seq
  bcachefs: Small check_fix_ptr fixes
  bcachefs: Fix opts.recovery_pass_last
  bcachefs: Fix allocate -> self healing path
  bcachefs: Fix endianness in casefold check/repair
  bcachefs: Path must be locked if trans->locked && should_be_locked
  bcachefs: Simplify bch2_path_put()
  bcachefs: Plumb btree_trans for more locking asserts
  bcachefs: Clear trans->locked before unlock
  bcachefs: Clear should_be_locked before unlock in key_cache_drop()
  bcachefs: bch2_path_get() reuses paths if upgrade_fails & !should_be_locked
  bcachefs: Give out new path if upgrade fails
  bcachefs: Fix btree_path_get_locks when not doing trans restart
  bcachefs: btree_node_locked_type_nowrite()
  bcachefs: Kill bch2_path_put_nokeep()
  bcachefs: bch2_journal_write_checksum()
  bcachefs: Reduce stack usage in data_update_index_update()
  bcachefs: bch2_trans_log_str()
  ...
2025-05-26 12:43:30 -07:00
Linus Torvalds
a2e43397e5 vfs-6.16-rc1.iomap
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Merge tag 'vfs-6.16-rc1.iomap' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull iomap updates from Christian Brauner:

 - More fallout and preparatory work associated with the folio batch
   prototype posted a while back.

   Mainly this just cleans up some of the helpers and pushes some
   pos/len trimming further down in the write begin path.

 - Add missing flag descriptions to the iomap documentation

* tag 'vfs-6.16-rc1.iomap' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  iomap: rework iomap_write_begin() to return folio offset and length
  iomap: push non-large folio check into get folio path
  iomap: helper to trim pos/bytes to within folio
  iomap: drop pos param from __iomap_[get|put]_folio()
  iomap: drop unnecessary pos param from iomap_write_[begin|end]
  iomap: resample iter->pos after iomap_write_begin() calls
  iomap: trace: Add missing flags to [IOMAP_|IOMAP_F_]FLAGS_STRINGS
  Documentation: iomap: Add missing flags description
2025-05-26 11:28:42 -07:00
Linus Torvalds
181d8e399f vfs-6.16-rc1.misc
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Merge tag 'vfs-6.16-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull misc vfs updates from Christian Brauner:
 "This contains the usual selections of misc updates for this cycle.

  Features:

   - Use folios for symlinks in the page cache

     FUSE already uses folios for its symlinks. Mirror that conversion
     in the generic code and the NFS code. That lets us get rid of a few
     folio->page->folio conversions in this path, and some of the few
     remaining users of read_cache_page() / read_mapping_page()

   - Try and make a few filesystem operations killable on the VFS
     inode->i_mutex level

   - Add sysctl vfs_cache_pressure_denom for bulk file operations

     Some workloads need to preserve more dentries than we currently
     allow through out sysctl interface

     A HDFS servers with 12 HDDs per server, on a HDFS datanode startup
     involves scanning all files and caching their metadata (including
     dentries and inodes) in memory. Each HDD contains approximately 2
     million files, resulting in a total of ~20 million cached dentries
     after initialization

     To minimize dentry reclamation, they set vfs_cache_pressure to 1.
     Despite this configuration, memory pressure conditions can still
     trigger reclamation of up to 50% of cached dentries, reducing the
     cache from 20 million to approximately 10 million entries. During
     the subsequent cache rebuild period, any HDFS datanode restart
     operation incurs substantial latency penalties until full cache
     recovery completes

     To maintain service stability, more dentries need to be preserved
     during memory reclamation. The current minimum reclaim ratio (1/100
     of total dentries) remains too aggressive for such workload. This
     patch introduces vfs_cache_pressure_denom for more granular cache
     pressure control

     The configuration [vfs_cache_pressure=1,
     vfs_cache_pressure_denom=10000] effectively maintains the full 20
     million dentry cache under memory pressure, preventing datanode
     restart performance degradation

   - Avoid some jumps in inode_permission() using likely()/unlikely()

   - Avid a memory access which is most likely a cache miss when
     descending into devcgroup_inode_permission()

   - Add fastpath predicts for stat() and fdput()

   - Anonymous inodes currently don't come with a proper mode causing
     issues in the kernel when we want to add useful VFS debug assert.
     Fix that by giving them a proper mode and masking it off when we
     report it to userspace which relies on them not having any mode

   - Anonymous inodes currently allow to change inode attributes because
     the VFS falls back to simple_setattr() if i_op->setattr isn't
     implemented. This means the ownership and mode for every single
     user of anon_inode_inode can be changed. Block that as it's either
     useless or actively harmful. If specific ownership is needed the
     respective subsystem should allocate anonymous inodes from their
     own private superblock

   - Raise SB_I_NODEV and SB_I_NOEXEC on the anonymous inode superblock

   - Add proper tests for anonymous inode behavior

   - Make it easy to detect proper anonymous inodes and to ensure that
     we can detect them in codepaths such as readahead()

  Cleanups:

   - Port pidfs to the new anon_inode_{g,s}etattr() helpers

   - Try to remove the uselib() system call

   - Add unlikely branch hint return path for poll

   - Add unlikely branch hint on return path for core_sys_select

   - Don't allow signals to interrupt getdents copying for fuse

   - Provide a size hint to dir_context for during readdir()

   - Use writeback_iter directly in mpage_writepages

   - Update compression and mtime descriptions in initramfs
     documentation

   - Update main netfs API document

   - Remove useless plus one in super_cache_scan()

   - Remove unnecessary NULL-check guards during setns()

   - Add separate separate {get,put}_cgroup_ns no-op cases

  Fixes:

   - Fix typo in root= kernel parameter description

   - Use KERN_INFO for infof()|info_plog()|infofc()

   - Correct comments of fs_validate_description()

   - Mark an unlikely if condition with unlikely() in
     vfs_parse_monolithic_sep()

   - Delete macro fsparam_u32hex()

   - Remove unused and problematic validate_constant_table()

   - Fix potential unsigned integer underflow in fs_name()

   - Make file-nr output the total allocated file handles"

* tag 'vfs-6.16-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (43 commits)
  fs: Pass a folio to page_put_link()
  nfs: Use a folio in nfs_get_link()
  fs: Convert __page_get_link() to use a folio
  fs/read_write: make default_llseek() killable
  fs/open: make do_truncate() killable
  fs/open: make chmod_common() and chown_common() killable
  include/linux/fs.h: add inode_lock_killable()
  readdir: supply dir_context.count as readdir buffer size hint
  vfs: Add sysctl vfs_cache_pressure_denom for bulk file operations
  fuse: don't allow signals to interrupt getdents copying
  Documentation: fix typo in root= kernel parameter description
  include/cgroup: separate {get,put}_cgroup_ns no-op case
  kernel/nsproxy: remove unnecessary guards
  fs: use writeback_iter directly in mpage_writepages
  fs: remove useless plus one in super_cache_scan()
  fs: add S_ANON_INODE
  fs: remove uselib() system call
  device_cgroup: avoid access to ->i_rdev in the common case in devcgroup_inode_permission()
  fs/fs_parse: Remove unused and problematic validate_constant_table()
  fs: touch up predicts in inode_permission()
  ...
2025-05-26 09:02:39 -07:00
Linus Torvalds
dc76285144 vfs-6.16-rc1.writepage
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Merge tag 'vfs-6.16-rc1.writepage' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull final writepage conversion from Christian Brauner:
 "This converts vboxfs from ->writepage() to ->writepages().

  This was the last user of the ->writepage() method. So remove
  ->writepage() completely and all references to it"

* tag 'vfs-6.16-rc1.writepage' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  fs: Remove aops->writepage
  mm: Remove swap_writepage() and shmem_writepage()
  ttm: Call shmem_writeout() from ttm_backup_backup_page()
  i915: Use writeback_iter()
  shmem: Add shmem_writeout()
  writeback: Remove writeback_use_writepage()
  migrate: Remove call to ->writepage
  vboxsf: Convert to writepages
  9p: Add a migrate_folio method
2025-05-26 08:23:09 -07:00
Linus Torvalds
6d5b940e1e vfs-6.16-rc1.async.dir
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Merge tag 'vfs-6.16-rc1.async.dir' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs directory lookup updates from Christian Brauner:
 "This contains cleanups for the lookup_one*() family of helpers.

  We expose a set of functions with names containing "lookup_one_len"
  and others without the "_len". This difference has nothing to do with
  "len". It's rater a historical accident that can be confusing.

  The functions without "_len" take a "mnt_idmap" pointer. This is found
  in the "vfsmount" and that is an important question when choosing
  which to use: do you have a vfsmount, or are you "inside" the
  filesystem. A related question is "is permission checking relevant
  here?".

  nfsd and cachefiles *do* have a vfsmount but *don't* use the non-_len
  functions. They pass nop_mnt_idmap and refuse to work on filesystems
  which have any other idmap.

  This work changes nfsd and cachefile to use the lookup_one family of
  functions and to explictily pass &nop_mnt_idmap which is consistent
  with all other vfs interfaces used where &nop_mnt_idmap is explicitly
  passed.

  The remaining uses of the "_one" functions do not require permission
  checks so these are renamed to be "_noperm" and the permission
  checking is removed.

  This series also changes these lookup function to take a qstr instead
  of separate name and len. In many cases this simplifies the call"

* tag 'vfs-6.16-rc1.async.dir' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  VFS: change lookup_one_common and lookup_noperm_common to take a qstr
  Use try_lookup_noperm() instead of d_hash_and_lookup() outside of VFS
  VFS: rename lookup_one_len family to lookup_noperm and remove permission check
  cachefiles: Use lookup_one() rather than lookup_one_len()
  nfsd: Use lookup_one() rather than lookup_one_len()
  VFS: improve interface for lookup_one functions
2025-05-26 08:02:43 -07:00
Sheng Yong
c36ec00d7f erofs: add 'fsoffset' mount option to specify filesystem offset
When attempting to use an archive file, such as APEX on android,
as a file-backed mount source, it fails because EROFS image within
the archive file does not start at offset 0. As a result, a loop
or a dm device is still needed to attach the image file at an
appropriate offset first. Similarly, if an EROFS image within a
block device does not start at offset 0, it cannot be mounted
directly either.

To address this issue, this patch adds a new mount option `fsoffset=x'
to accept a start offset for the primary device. The offset should be
aligned to the block size. EROFS will add this offset before performing
read requests.

Signed-off-by: Sheng Yong <shengyong1@xiaomi.com>
Signed-off-by: Wang Shuai <wangshuai12@xiaomi.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20250517090544.2687651-1-shengyong1@xiaomi.com
[ Gao Xiang: minor update on documentation and the error message. ]
Reviewed-by: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
2025-05-22 11:57:57 +08:00
Kent Overstreet
c53e5c0c19 docs: bcachefs: add casefolding reference
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-05-21 20:14:39 -04:00
Kent Overstreet
9e260e4590 docs: bcachefs: idle work scheduling design doc
People have been asking to see the plan for this, so -

bcachefs has various background tasks that need to be scheduled to
balance efficiency, predictability of performance, etc.

The design and philosophy hasn't changed too much since bcache, which
was primarily designed for server usage, with sustained load in mind.

These days we're seeing more desktop usage - where we really want to let
the system idle effictively, to reduce total power usage - while also
still balancing previous concerns, we still want to let work accumulate
to a degree.

This lays out all the requirements and starts to sketch out the
algorithm I have in mind.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-05-21 20:14:23 -04:00
Max Kellermann
c1a606cd75
fs/netfs: remove unused flag NETFS_SREQ_SEEK_DATA_READ
This flag was added by commit 3d3c950467 ("netfs: Provide readahead
and readpage netfs helpers") but its only user was removed by commit
86b374d061 ("netfs: Remove fs/netfs/io.c").

Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/20250519134813.2975312-3-dhowells@redhat.com
cc: Paulo Alcantara <pc@manguebit.com>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-05-21 14:34:37 +02:00
Ritesh Harjani (IBM)
0bf1f51e34 ext4: Add atomic block write documentation
Add an initial documentation around atomic writes support in ext4.

Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://patch.msgid.link/d3893b9f5ad70317abae72046e81e4c180af91bf.1747337952.git.ritesh.list@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2025-05-20 10:31:12 -04:00
Randy Dunlap
14e991154d Docs: relay: editing cleanups
Cleanup some punctuation, capital letter, and a missing word
in relay.rst.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250512023233.107582-1-rdunlap@infradead.org>
2025-05-19 08:02:14 -06:00
James Morse
7168ae330e x86,fs/resctrl: Move the resctrl filesystem code to live in /fs/resctrl
Resctrl is a filesystem interface to hardware that provides cache
allocation policy and bandwidth control for groups of tasks or CPUs.

To support more than one architecture, resctrl needs to live in /fs/.

Move the code that is concerned with the filesystem interface to
/fs/resctrl.

Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/20250515165855.31452-25-james.morse@arm.com
2025-05-16 14:36:09 +02:00
Chao Yu
13be879576 f2fs: fix 32-bits hexademical number in fault injection doc
FAULT_KMALLOC                    0x000000001

There is one redundant '0' in 32-bits hexademical number of fault type,
remove it.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2025-05-13 15:37:00 +00:00
Chen Linxuan
18ee43c398 docs: filesystems: add fuse-passthrough.rst
Add a documentation about FUSE passthrough.

It's mainly about why FUSE passthrough needs CAP_SYS_ADMIN.

Link: https://lore.kernel.org/all/4b64a41c-6167-4c02-8bae-3021270ca519@fastmail.fm/T/#mc73e04df56b8830b1d7b06b5d9f22e594fba423e
Link: https://lore.kernel.org/linux-fsdevel/CAOQ4uxhAY1m7ubJ3p-A3rSufw_53WuDRMT1Zqe_OC0bP_Fb3Zw@mail.gmail.com/
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Chen Linxuan <chenlinxuan@uniontech.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2025-05-12 10:02:08 +02:00
Dr. David Alan Gilbert
2a1c615813 relay: remove unused relay_late_setup_files
The last use of relay_late_setup_files() was removed in 2018 by commit
2b47733045 ("drm/i915/guc: Merge log relay file and channel creation")

Remove it and the helper it used.

relay_late_setup_files() was used for eventually registering 'buffer only'
channels.  With it gone, delete the docs that explain how to do that. 
Which suggests it should be possible to lose the 'has_base_filename'
flags.

(Are there any other uses??)

Link: https://lkml.kernel.org/r/20250418234932.490863-1-linux@treblig.org
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andriy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-05-11 17:54:09 -07:00
Chao Yu
0244c77fed f2fs: support FAULT_TIMEOUT
Support to inject a timeout fault into function, currently it only
support to inject timeout to commit_atomic_write flow to reproduce
inconsistent bug, like the bug fixed by commit f098aeba04 ("f2fs:
fix to avoid atomicity corruption of atomic file").

By default, the new type fault will inject 1000ms timeout, and the
timeout process can be interrupted by SIGKILL.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2025-05-06 15:46:55 +00:00
Al Viro
006ff7498f saner calling conventions for ->d_automount()
Currently the calling conventions for ->d_automount() instances have
an odd wart - returned new mount to be attached is expected to have
refcount 2.

That kludge is intended to make sure that mark_mounts_for_expiry() called
before we get around to attaching that new mount to the tree won't decide
to take it out.  finish_automount() drops the extra reference after it's
done with attaching mount to the tree - or drops the reference twice in
case of error.  ->d_automount() instances have rather counterintuitive
boilerplate in them.

There's a much simpler approach: have mark_mounts_for_expiry() skip the
mounts that are yet to be mounted.  And to hell with grabbing/dropping
those extra references.  Makes for simpler correctness analysis, at that...

Reviewed-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Acked-by: David Howells <dhowells@redhat.com>
Tested-by: David Howells <dhowells@redhat.com>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2025-05-05 13:42:49 -04:00
Timur Tabi
e99efa8ac8 docs: debugfs: do not recommend debugfs_remove_recursive
Update the debugfs documentation to indicate that debugfs_remove()
should be used to clean up debugfs entries.

In commit a3d1e7eb5a ("simple_recursive_removal(): kernel-side rm -rf
for ramfs-style filesystems"), function debugfs_remove_recursive()
was made into an alias for debugfs_remove():

    #define debugfs_remove_recursive debugfs_remove

Therefore, drivers should just use debugfs_remove() going forward.

Signed-off-by: Timur Tabi <ttabi@nvidia.com>
Link: https://lore.kernel.org/r/20250429173958.3973958-1-ttabi@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-04-30 19:11:04 +02:00
Miklos Szeredi
5ef7bcdeec ovl: relax redirect/metacopy requirements for lower -> data redirect
Allow the special case of a redirect from a lower layer to a data layer
without having to turn on metacopy.  This makes the feature work with
userxattr, which in turn allows data layers to be usable in user
namespaces.

Minimize the risk by only enabling redirect from a single lower layer to a
data layer iff a data layer is specified.  The only way to access a data
layer is to enable this, so there's really no reason not to enable this.

This can be used safely if the lower layer is read-only and the
user.overlay.redirect xattr cannot be modified.

Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2025-04-30 10:55:27 +02:00
Zijun Hu
d1f482108a
fs/fs_parse: Remove unused and problematic validate_constant_table()
Remove validate_constant_table() since:

- It has no caller.

- It has below 3 bugs for good constant table array array[] which must
  end with a empty entry, and take below invocation for explaination:
  validate_constant_table(array, ARRAY_SIZE(array), ...)

  - Always return wrong value due to the last empty entry.
  - Imprecise error message for missorted case.
  - Potential NULL pointer dereference since the last pr_err() may use
    @tbl[i].name NULL pointer to print the last empty entry's name.

Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/20250415-fix_fs-v4-1-5d575124a3ff@quicinc.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-04-21 10:27:59 +02:00
Zijun Hu
296b67059e
fs/fs_parse: Delete macro fsparam_u32hex()
Delete macro fsparam_u32hex() since:

- it has no caller.

- it uses as type @fs_param_is_u32_hex which is never defined, so will
  cause compile error when caller uses it.

Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/20250411-fix_fs-v2-1-5d3395c102e4@quicinc.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-04-21 10:27:58 +02:00
Ritesh Harjani (IBM)
336bac5e08
Documentation: iomap: Add missing flags description
Let's document the use of these flags in iomap design doc where other
flags are defined too -

- IOMAP_F_BOUNDARY was added by XFS to prevent merging of I/O and I/O
  completions across RTG boundaries.
- IOMAP_F_ATOMIC_BIO was added for supporting atomic I/O operations
  for filesystems to inform the iomap that it needs HW-offload based
  mechanism for torn-write protection.

While we are at it, let's also fix the description of IOMAP_F_PRIVATE
flag after a recent:
commit 923936efeb ("iomap: Fix conflicting values of iomap flags")

Signed-off-by: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Link: https://lore.kernel.org/8d8534a704c4f162f347a84830710db32a927b2e.1744432270.git.ritesh.list@gmail.com
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-04-15 10:30:48 +02:00
Linus Torvalds
5aaaedb0cb A few more miscellaneous ext4 bug fixes and cleanups including some
syzbot failures and fixing a stale file handing refeencing an inode
 previously used as a regular file, but which has been deleted and
 reused as an ea_inode would result in ext4 erroneously consider this a
 case of fs corrupotion.
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Merge tag 'ext4_for_linus-6.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "A few more miscellaneous ext4 bug fixes and cleanups including some
  syzbot failures and fixing a stale file handing refeencing an inode
  previously used as a regular file, but which has been deleted and
  reused as an ea_inode would result in ext4 erroneously considering
  this a case of fs corruption"

* tag 'ext4_for_linus-6.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix off-by-one error in do_split
  ext4: make block validity check resistent to sb bh corruption
  ext4: avoid -Wflex-array-member-not-at-end warning
  Documentation: ext4: Add fields to ext4_super_block documentation
  ext4: don't treat fhandle lookup of ea_inode as FS corruption
2025-04-13 07:15:50 -07:00
Tom Vierjahn
ce7e8a65aa Documentation: ext4: Add fields to ext4_super_block documentation
Documentation and implementation of the ext4 super block have
slightly diverged: Padding has been removed in order to make room for
new fields that are still missing in the documentation.

Add the new fields s_encryption_level, s_first_error_errorcode,
s_last_error_errorcode to the documentation of the ext4 super block.

Fixes: f542fbe8d5 ("ext4 crypto: reserve codepoints used by the ext4 encryption feature")
Fixes: 878520ac45 ("ext4: save the error code which triggered an ext4_error() in the superblock")

Signed-off-by: Tom Vierjahn <tom.vierjahn@acm.org>
Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Link: https://patch.msgid.link/20250324221004.5268-1-tom.vierjahn@acm.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2025-04-12 21:50:41 -04:00
David Howells
f1745496d3
netfs: Update main API document
Bring the netfs documentation up to date.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/1690127.1744208325@warthog.procyon.org.uk
Reviewed-by: "Paulo Alcantara (Red Hat)" <pc@manguebit.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: Viacheslav Dubeyko <slava@dubeyko.com>
cc: Alex Markuze <amarkuze@redhat.com>
cc: Timothy Day <timday@amazon.com>
cc: Jonathan Corbet <corbet@lwn.net>
cc: netfs@lists.linux.dev
cc: linux-doc@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-04-11 15:23:50 +02:00
Eric Biggers
c07d3aede2 fscrypt: add support for hardware-wrapped keys
Add support for hardware-wrapped keys to fscrypt.  Such keys are
protected from certain attacks, such as cold boot attacks.  For more
information, see the "Hardware-wrapped keys" section of
Documentation/block/inline-encryption.rst.

To support hardware-wrapped keys in fscrypt, we allow the fscrypt master
keys to be hardware-wrapped.  File contents encryption is done by
passing the wrapped key to the inline encryption hardware via
blk-crypto.  Other fscrypt operations such as filenames encryption
continue to be done by the kernel, using the "software secret" which the
hardware derives.  For more information, see the documentation which
this patch adds to Documentation/filesystems/fscrypt.rst.

Note that this feature doesn't require any filesystem-specific changes.
However it does depend on inline encryption support, and thus currently
it is only applicable to ext4 and f2fs.

The version of this feature introduced by this patch is mostly
equivalent to the version that has existed downstream in the Android
Common Kernels since 2020.  However, a couple fixes are included.
First, the flags field in struct fscrypt_add_key_arg is now placed in
the proper location.  Second, key identifiers for HW-wrapped keys are
now derived using a distinct HKDF context byte; this fixes a bug where a
raw key could have the same identifier as a HW-wrapped key.  Note that
as a result of these fixes, the version of this feature introduced by
this patch is not UAPI or on-disk format compatible with the version in
the Android Common Kernels, though the divergence is limited to just
those specific fixes.  This version should be used going forwards.

This patch has been heavily rewritten from the original version by
Gaurav Kashyap <quic_gaurkash@quicinc.com> and
Barani Muthukumaran <bmuthuku@codeaurora.org>.

Tested-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> # sm8650
Link: https://lore.kernel.org/r/20250404225859.172344-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
2025-04-08 19:32:11 -07:00
NeilBrown
06c567403a
Use try_lookup_noperm() instead of d_hash_and_lookup() outside of VFS
try_lookup_noperm() and d_hash_and_lookup() are nearly identical.  The
former does some validation of the name where the latter doesn't.
Outside of the VFS that validation is likely valuable, and having only
one exported function for this task is certainly a good idea.

So make d_hash_and_lookup() local to VFS files and change all other
callers to try_lookup_noperm().  Note that the arguments are swapped.

Signed-off-by: NeilBrown <neilb@suse.de>
Link: https://lore.kernel.org/r/20250319031545.2999807-6-neil@brown.name
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-04-08 11:24:41 +02:00
NeilBrown
fa6fe07d15
VFS: rename lookup_one_len family to lookup_noperm and remove permission check
The lookup_one_len family of functions is (now) only used internally by
a filesystem on itself either
- in a context where permission checking is irrelevant such as by a
  virtual filesystem populating itself, or xfs accessing its ORPHANAGE
  or dquota accessing the quota file; or
- in a context where a permission check (MAY_EXEC on the parent) has just
  been performed such as a network filesystem finding in "silly-rename"
  file in the same directory.  This is also the context after the
  _parentat() functions where currently lookup_one_qstr_excl() is used.

So the permission check is pointless.

The name "one_len" is unhelpful in understanding the purpose of these
functions and should be changed.  Most of the callers pass the len as
"strlen()" so using a qstr and QSTR() can simplify the code.

This patch renames these functions (include lookup_positive_unlocked()
which is part of the family despite the name) to have a name based on
"lookup_noperm".  They are changed to receive a 'struct qstr' instead
of separate name and len.  In a few cases the use of QSTR() results in a
new call to strlen().

try_lookup_noperm() takes a pointer to a qstr instead of the whole
qstr.  This is consistent with d_hash_and_lookup() (which is nearly
identical) and useful for lookup_noperm_unlocked().

The new lookup_noperm_common() doesn't take a qstr yet.  That will be
tidied up in a subsequent patch.

Signed-off-by: NeilBrown <neil@brown.name>
Link: https://lore.kernel.org/r/20250319031545.2999807-5-neil@brown.name
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-04-08 11:24:36 +02:00
Matthew Wilcox (Oracle)
6b0dfabb35
fs: Remove aops->writepage
All callers and implementations are now removed, so remove the operation
and update the documentation to match.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250402150005.2309458-10-willy@infradead.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-04-07 09:36:50 +02:00
NeilBrown
5741909697
VFS: improve interface for lookup_one functions
The family of functions:
  lookup_one()
  lookup_one_unlocked()
  lookup_one_positive_unlocked()

appear designed to be used by external clients of the filesystem rather
than by filesystems acting on themselves as the lookup_one_len family
are used.

They are used by:
   btrfs/ioctl - which is a user-space interface rather than an internal
     activity
   exportfs - i.e. from nfsd or the open_by_handle_at interface
   overlayfs - at access the underlying filesystems
   smb/server - for file service

They should be used by nfsd (more than just the exportfs path) and
cachefs but aren't.

It would help if the documentation didn't claim they should "not be
called by generic code".

Also the path component name is passed as "name" and "len" which are
(confusingly?) separate by the "base".  In some cases the len in simply
"strlen" and so passing a qstr using QSTR() would make the calling
clearer.
Other callers do pass separate name and len which are stored in a
struct.  Sometimes these are already stored in a qstr, other times it
easily could be.

So this patch changes these three functions to receive a 'struct qstr *',
and improves the documentation.

QSTR_LEN() is added to make it easy to pass a QSTR containing a known
len.

[brauner@kernel.org: take a struct qstr pointer]
Signed-off-by: NeilBrown <neil@brown.name>
Link: https://lore.kernel.org/r/20250319031545.2999807-2-neil@brown.name
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-04-07 09:25:32 +02:00
Linus Torvalds
bdafff62ae 9p update for 6.15-rc1
- fix handling of bogus (negative/too long) replies
 - fix crash on mkdir with ACLs
 (... looks like nobody is using ACLs with semi-recent kernels...)
 - ipv6 support for trans=tcp
 - minor concurrency fix to make syzbot happy
 - minor cleanup
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Merge tag '9p-for-6.15-rc1' of https://github.com/martinetd/linux

Pull 9p updates from Dominique Martinet:

 - fix handling of bogus (negative/too long) replies

 - fix crash on mkdir with ACLs (... looks like nobody is using ACLs
   with semi-recent kernels...)

 - ipv6 support for trans=tcp

 - minor concurrency fix to make syzbot happy

 - minor cleanup

* tag '9p-for-6.15-rc1' of https://github.com/martinetd/linux:
  docs: fs/9p: Add missing "not" in cache documentation
  9p: Use hashtable.h for hash_errmap
  Documentation/fs/9p: fix broken link
  9p/trans_fd: mark concurrent read and writes to p9_conn->err
  9p/net: return error on bogus (longer than requested) replies
  9p/net: fix improper handling of bogus negative read/write replies
  fs/9p: fix NULL pointer dereference on mkdir
  net/9p/fd: support ipv6 for trans=tcp
2025-04-03 15:35:46 -07:00
Tingmao Wang
4210030d8b docs: fs/9p: Add missing "not" in cache documentation
A quick fix for what I assume is a typo.

Signed-off-by: Tingmao Wang <m@maowtm.org>
Reviewed-by: Christian Schoenebeck <linux_oss@crudebyte.com>
Message-ID: <20250330213443.98434-1-m@maowtm.org>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
2025-04-03 12:31:11 +09:00
Linus Torvalds
d6b02199cd - The 7 patch series "powerpc/crash: use generic crashkernel
reservation" from Sourabh Jain changes powerpc's kexec code to use more
   of the generic layers.
 
 - The 2 patch series "get_maintainer: report subsystem status
   separately" from Vlastimil Babka makes some long-requested improvements
   to the get_maintainer output.
 
 - The 4 patch series "ucount: Simplify refcounting with rcuref_t" from
   Sebastian Siewior cleans up and optimizing the refcounting in the ucount
   code.
 
 - The 12 patch series "reboot: support runtime configuration of
   emergency hw_protection action" from Ahmad Fatoum improves the ability
   for a driver to perform an emergency system shutdown or reboot.
 
 - The 16 patch series "Converge on using secs_to_jiffies() part two"
   from Easwar Hariharan performs further migrations from
   msecs_to_jiffies() to secs_to_jiffies().
 
 - The 7 patch series "lib/interval_tree: add some test cases and
   cleanup" from Wei Yang permits more userspace testing of kernel library
   code, adds some more tests and performs some cleanups.
 
 - The 2 patch series "hung_task: Dump the blocking task stacktrace" from
   Masami Hiramatsu arranges for the hung_task detector to dump the stack
   of the blocking task and not just that of the blocked task.
 
 - The 4 patch series "resource: Split and use DEFINE_RES*() macros" from
   Andy Shevchenko provides some cleanups to the resource definition
   macros.
 
 - Plus the usual shower of singleton patches - please see the individual
   changelogs for details.
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Merge tag 'mm-nonmm-stable-2025-03-30-18-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - The series "powerpc/crash: use generic crashkernel reservation" from
   Sourabh Jain changes powerpc's kexec code to use more of the generic
   layers.

 - The series "get_maintainer: report subsystem status separately" from
   Vlastimil Babka makes some long-requested improvements to the
   get_maintainer output.

 - The series "ucount: Simplify refcounting with rcuref_t" from
   Sebastian Siewior cleans up and optimizing the refcounting in the
   ucount code.

 - The series "reboot: support runtime configuration of emergency
   hw_protection action" from Ahmad Fatoum improves the ability for a
   driver to perform an emergency system shutdown or reboot.

 - The series "Converge on using secs_to_jiffies() part two" from Easwar
   Hariharan performs further migrations from msecs_to_jiffies() to
   secs_to_jiffies().

 - The series "lib/interval_tree: add some test cases and cleanup" from
   Wei Yang permits more userspace testing of kernel library code, adds
   some more tests and performs some cleanups.

 - The series "hung_task: Dump the blocking task stacktrace" from Masami
   Hiramatsu arranges for the hung_task detector to dump the stack of
   the blocking task and not just that of the blocked task.

 - The series "resource: Split and use DEFINE_RES*() macros" from Andy
   Shevchenko provides some cleanups to the resource definition macros.

 - Plus the usual shower of singleton patches - please see the
   individual changelogs for details.

* tag 'mm-nonmm-stable-2025-03-30-18-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (77 commits)
  mailmap: consolidate email addresses of Alexander Sverdlin
  fs/procfs: fix the comment above proc_pid_wchan()
  relay: use kasprintf() instead of fixed buffer formatting
  resource: replace open coded variant of DEFINE_RES()
  resource: replace open coded variants of DEFINE_RES_*_NAMED()
  resource: replace open coded variant of DEFINE_RES_NAMED_DESC()
  resource: split DEFINE_RES_NAMED_DESC() out of DEFINE_RES_NAMED()
  samples: add hung_task detector mutex blocking sample
  hung_task: show the blocker task if the task is hung on mutex
  kexec_core: accept unaccepted kexec segments' destination addresses
  watchdog/perf: optimize bytes copied and remove manual NUL-termination
  lib/interval_tree: fix the comment of interval_tree_span_iter_next_gap()
  lib/interval_tree: skip the check before go to the right subtree
  lib/interval_tree: add test case for span iteration
  lib/interval_tree: add test case for interval_tree_iter_xxx() helpers
  lib/rbtree: add random seed
  lib/rbtree: split tests
  lib/rbtree: enable userland test suite for rbtree related data structure
  checkpatch: describe --min-conf-desc-length
  scripts/gdb/symbols: determine KASLR offset on s390
  ...
2025-04-01 10:06:52 -07:00
Linus Torvalds
eb0ece1602 - The 6 patch series "Enable strict percpu address space checks" from
Uros Bizjak uses x86 named address space qualifiers to provide
   compile-time checking of percpu area accesses.
 
   This has caused a small amount of fallout - two or three issues were
   reported.  In all cases the calling code was founf to be incorrect.
 
 - The 4 patch series "Some cleanup for memcg" from Chen Ridong
   implements some relatively monir cleanups for the memcontrol code.
 
 - The 17 patch series "mm: fixes for device-exclusive entries (hmm)"
   from David Hildenbrand fixes a boatload of issues which David found then
   using device-exclusive PTE entries when THP is enabled.  More work is
   needed, but this makes thins better - our own HMM selftests now succeed.
 
 - The 2 patch series "mm: zswap: remove z3fold and zbud" from Yosry
   Ahmed remove the z3fold and zbud implementations.  They have been
   deprecated for half a year and nobody has complained.
 
 - The 5 patch series "mm: further simplify VMA merge operation" from
   Lorenzo Stoakes implements numerous simplifications in this area.  No
   runtime effects are anticipated.
 
 - The 4 patch series "mm/madvise: remove redundant mmap_lock operations
   from process_madvise()" from SeongJae Park rationalizes the locking in
   the madvise() implementation.  Performance gains of 20-25% were observed
   in one MADV_DONTNEED microbenchmark.
 
 - The 12 patch series "Tiny cleanup and improvements about SWAP code"
   from Baoquan He contains a number of touchups to issues which Baoquan
   noticed when working on the swap code.
 
 - The 2 patch series "mm: kmemleak: Usability improvements" from Catalin
   Marinas implements a couple of improvements to the kmemleak user-visible
   output.
 
 - The 2 patch series "mm/damon/paddr: fix large folios access and
   schemes handling" from Usama Arif provides a couple of fixes for DAMON's
   handling of large folios.
 
 - The 3 patch series "mm/damon/core: fix wrong and/or useless
   damos_walk() behaviors" from SeongJae Park fixes a few issues with the
   accuracy of kdamond's walking of DAMON regions.
 
 - The 3 patch series "expose mapping wrprotect, fix fb_defio use" from
   Lorenzo Stoakes changes the interaction between framebuffer deferred-io
   and core MM.  No functional changes are anticipated - this is
   preparatory work for the future removal of page structure fields.
 
 - The 4 patch series "mm/damon: add support for hugepage_size DAMOS
   filter" from Usama Arif adds a DAMOS filter which permits the filtering
   by huge page sizes.
 
 - The 4 patch series "mm: permit guard regions for file-backed/shmem
   mappings" from Lorenzo Stoakes extends the guard region feature from its
   present "anon mappings only" state.  The feature now covers shmem and
   file-backed mappings.
 
 - The 4 patch series "mm: batched unmap lazyfree large folios during
   reclamation" from Barry Song cleans up and speeds up the unmapping for
   pte-mapped large folios.
 
 - The 18 patch series "reimplement per-vma lock as a refcount" from
   Suren Baghdasaryan puts the vm_lock back into the vma.  Our reasons for
   pulling it out were largely bogus and that change made the code more
   messy.  This patchset provides small (0-10%) improvements on one
   microbenchmark.
 
 - The 5 patch series "Docs/mm/damon: misc DAMOS filters documentation
   fixes and improves" from SeongJae Park does some maintenance work on the
   DAMON docs.
 
 - The 27 patch series "hugetlb/CMA improvements for large systems" from
   Frank van der Linden addresses a pile of issues which have been observed
   when using CMA on large machines.
 
 - The 2 patch series "mm/damon: introduce DAMOS filter type for unmapped
   pages" from SeongJae Park enables users of DMAON/DAMOS to filter my the
   page's mapped/unmapped status.
 
 - The 19 patch series "zsmalloc/zram: there be preemption" from Sergey
   Senozhatsky teaches zram to run its compression and decompression
   operations preemptibly.
 
 - The 12 patch series "selftests/mm: Some cleanups from trying to run
   them" from Brendan Jackman fixes a pile of unrelated issues which
   Brendan encountered while runnimg our selftests.
 
 - The 2 patch series "fs/proc/task_mmu: add guard region bit to pagemap"
   from Lorenzo Stoakes permits userspace to use /proc/pid/pagemap to
   determine whether a particular page is a guard page.
 
 - The 7 patch series "mm, swap: remove swap slot cache" from Kairui Song
   removes the swap slot cache from the allocation path - it simply wasn't
   being effective.
 
 - The 5 patch series "mm: cleanups for device-exclusive entries (hmm)"
   from David Hildenbrand implements a number of unrelated cleanups in this
   code.
 
 - The 5 patch series "mm: Rework generic PTDUMP configs" from Anshuman
   Khandual implements a number of preparatoty cleanups to the
   GENERIC_PTDUMP Kconfig logic.
 
 - The 8 patch series "mm/damon: auto-tune aggregation interval" from
   SeongJae Park implements a feedback-driven automatic tuning feature for
   DAMON's aggregation interval tuning.
 
 - The 5 patch series "Fix lazy mmu mode" from Ryan Roberts fixes some
   issues in powerpc, sparc and x86 lazy MMU implementations.  Ryan did
   this in preparation for implementing lazy mmu mode for arm64 to optimize
   vmalloc.
 
 - The 2 patch series "mm/page_alloc: Some clarifications for migratetype
   fallback" from Brendan Jackman reworks some commentary to make the code
   easier to follow.
 
 - The 3 patch series "page_counter cleanup and size reduction" from
   Shakeel Butt cleans up the page_counter code and fixes a size increase
   which we accidentally added late last year.
 
 - The 3 patch series "Add a command line option that enables control of
   how many threads should be used to allocate huge pages" from Thomas
   Prescher does that.  It allows the careful operator to significantly
   reduce boot time by tuning the parallalization of huge page
   initialization.
 
 - The 3 patch series "Fix calculations in trace_balance_dirty_pages()
   for cgwb" from Tang Yizhou fixes the tracing output from the dirty page
   balancing code.
 
 - The 9 patch series "mm/damon: make allow filters after reject filters
   useful and intuitive" from SeongJae Park improves the handling of allow
   and reject filters.  Behaviour is made more consistent and the
   documention is updated accordingly.
 
 - The 5 patch series "Switch zswap to object read/write APIs" from Yosry
   Ahmed updates zswap to the new object read/write APIs and thus permits
   the removal of some legacy code from zpool and zsmalloc.
 
 - The 6 patch series "Some trivial cleanups for shmem" from Baolin Wang
   does as it claims.
 
 - The 20 patch series "fs/dax: Fix ZONE_DEVICE page reference counts"
   from Alistair Popple regularizes the weird ZONE_DEVICE page refcount
   handling in DAX, permittig the removal of a number of special-case
   checks.
 
 - The 4 patch series "refactor mremap and fix bug" from Lorenzo Stoakes
   is a preparatoty refactoring and cleanup of the mremap() code.
 
 - The 20 patch series "mm: MM owner tracking for large folios (!hugetlb)
   + CONFIG_NO_PAGE_MAPCOUNT" from David Hildenbrand reworks the manner in
   which we determine whether a large folio is known to be mapped
   exclusively into a single MM.
 
 - The 8 patch series "mm/damon: add sysfs dirs for managing DAMOS
   filters based on handling layers" from SeongJae Park adds a couple of
   new sysfs directories to ease the management of DAMON/DAMOS filters.
 
 - The 13 patch series "arch, mm: reduce code duplication in mem_init()"
   from Mike Rapoport consolidates many per-arch implementations of
   mem_init() into code generic code, where that is practical.
 
 - The 13 patch series "mm/damon/sysfs: commit parameters online via
   damon_call()" from SeongJae Park continues the cleaning up of sysfs
   access to DAMON internal data.
 
 - The 3 patch series "mm: page_ext: Introduce new iteration API" from
   Luiz Capitulino reworks the page_ext initialization to fix a boot-time
   crash which was observed with an unusual combination of compile and
   cmdline options.
 
 - The 8 patch series "Buddy allocator like (or non-uniform) folio split"
   from Zi Yan reworks the code to split a folio into smaller folios.  The
   main benefit is lessened memory consumption: fewer post-split folios are
   generated.
 
 - The 2 patch series "Minimize xa_node allocation during xarry split"
   from Zi Yan reduces the number of xarray xa_nodes which are generated
   during an xarray split.
 
 - The 2 patch series "drivers/base/memory: Two cleanups" from Gavin Shan
   performs some maintenance work on the drivers/base/memory code.
 
 - The 3 patch series "Add tracepoints for lowmem reserves, watermarks
   and totalreserve_pages" from Martin Liu adds some more tracepoints to
   the page allocator code.
 
 - The 4 patch series "mm/madvise: cleanup requests validations and
   classifications" from SeongJae Park cleans up some warts which SeongJae
   observed during his earlier madvise work.
 
 - The 3 patch series "mm/hwpoison: Fix regressions in memory failure
   handling" from Shuai Xue addresses two quite serious regressions which
   Shuai has observed in the memory-failure implementation.
 
 - The 5 patch series "mm: reliable huge page allocator" from Johannes
   Weiner makes huge page allocations cheaper and more reliable by reducing
   fragmentation.
 
 - The 5 patch series "Minor memcg cleanups & prep for memdescs" from
   Matthew Wilcox is preparatory work for the future implementation of
   memdescs.
 
 - The 4 patch series "track memory used by balloon drivers" from Nico
   Pache introduces a way to track memory used by our various balloon
   drivers.
 
 - The 2 patch series "mm/damon: introduce DAMOS filter type for active
   pages" from Nhat Pham permits users to filter for active/inactive pages,
   separately for file and anon pages.
 
 - The 2 patch series "Adding Proactive Memory Reclaim Statistics" from
   Hao Jia separates the proactive reclaim statistics from the direct
   reclaim statistics.
 
 - The 2 patch series "mm/vmscan: don't try to reclaim hwpoison folio"
   from Jinjiang Tu fixes our handling of hwpoisoned pages within the
   reclaim code.
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Merge tag 'mm-stable-2025-03-30-16-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - The series "Enable strict percpu address space checks" from Uros
   Bizjak uses x86 named address space qualifiers to provide
   compile-time checking of percpu area accesses.

   This has caused a small amount of fallout - two or three issues were
   reported. In all cases the calling code was found to be incorrect.

 - The series "Some cleanup for memcg" from Chen Ridong implements some
   relatively monir cleanups for the memcontrol code.

 - The series "mm: fixes for device-exclusive entries (hmm)" from David
   Hildenbrand fixes a boatload of issues which David found then using
   device-exclusive PTE entries when THP is enabled. More work is
   needed, but this makes thins better - our own HMM selftests now
   succeed.

 - The series "mm: zswap: remove z3fold and zbud" from Yosry Ahmed
   remove the z3fold and zbud implementations. They have been deprecated
   for half a year and nobody has complained.

 - The series "mm: further simplify VMA merge operation" from Lorenzo
   Stoakes implements numerous simplifications in this area. No runtime
   effects are anticipated.

 - The series "mm/madvise: remove redundant mmap_lock operations from
   process_madvise()" from SeongJae Park rationalizes the locking in the
   madvise() implementation. Performance gains of 20-25% were observed
   in one MADV_DONTNEED microbenchmark.

 - The series "Tiny cleanup and improvements about SWAP code" from
   Baoquan He contains a number of touchups to issues which Baoquan
   noticed when working on the swap code.

 - The series "mm: kmemleak: Usability improvements" from Catalin
   Marinas implements a couple of improvements to the kmemleak
   user-visible output.

 - The series "mm/damon/paddr: fix large folios access and schemes
   handling" from Usama Arif provides a couple of fixes for DAMON's
   handling of large folios.

 - The series "mm/damon/core: fix wrong and/or useless damos_walk()
   behaviors" from SeongJae Park fixes a few issues with the accuracy of
   kdamond's walking of DAMON regions.

 - The series "expose mapping wrprotect, fix fb_defio use" from Lorenzo
   Stoakes changes the interaction between framebuffer deferred-io and
   core MM. No functional changes are anticipated - this is preparatory
   work for the future removal of page structure fields.

 - The series "mm/damon: add support for hugepage_size DAMOS filter"
   from Usama Arif adds a DAMOS filter which permits the filtering by
   huge page sizes.

 - The series "mm: permit guard regions for file-backed/shmem mappings"
   from Lorenzo Stoakes extends the guard region feature from its
   present "anon mappings only" state. The feature now covers shmem and
   file-backed mappings.

 - The series "mm: batched unmap lazyfree large folios during
   reclamation" from Barry Song cleans up and speeds up the unmapping
   for pte-mapped large folios.

 - The series "reimplement per-vma lock as a refcount" from Suren
   Baghdasaryan puts the vm_lock back into the vma. Our reasons for
   pulling it out were largely bogus and that change made the code more
   messy. This patchset provides small (0-10%) improvements on one
   microbenchmark.

 - The series "Docs/mm/damon: misc DAMOS filters documentation fixes and
   improves" from SeongJae Park does some maintenance work on the DAMON
   docs.

 - The series "hugetlb/CMA improvements for large systems" from Frank
   van der Linden addresses a pile of issues which have been observed
   when using CMA on large machines.

 - The series "mm/damon: introduce DAMOS filter type for unmapped pages"
   from SeongJae Park enables users of DMAON/DAMOS to filter my the
   page's mapped/unmapped status.

 - The series "zsmalloc/zram: there be preemption" from Sergey
   Senozhatsky teaches zram to run its compression and decompression
   operations preemptibly.

 - The series "selftests/mm: Some cleanups from trying to run them" from
   Brendan Jackman fixes a pile of unrelated issues which Brendan
   encountered while runnimg our selftests.

 - The series "fs/proc/task_mmu: add guard region bit to pagemap" from
   Lorenzo Stoakes permits userspace to use /proc/pid/pagemap to
   determine whether a particular page is a guard page.

 - The series "mm, swap: remove swap slot cache" from Kairui Song
   removes the swap slot cache from the allocation path - it simply
   wasn't being effective.

 - The series "mm: cleanups for device-exclusive entries (hmm)" from
   David Hildenbrand implements a number of unrelated cleanups in this
   code.

 - The series "mm: Rework generic PTDUMP configs" from Anshuman Khandual
   implements a number of preparatoty cleanups to the GENERIC_PTDUMP
   Kconfig logic.

 - The series "mm/damon: auto-tune aggregation interval" from SeongJae
   Park implements a feedback-driven automatic tuning feature for
   DAMON's aggregation interval tuning.

 - The series "Fix lazy mmu mode" from Ryan Roberts fixes some issues in
   powerpc, sparc and x86 lazy MMU implementations. Ryan did this in
   preparation for implementing lazy mmu mode for arm64 to optimize
   vmalloc.

 - The series "mm/page_alloc: Some clarifications for migratetype
   fallback" from Brendan Jackman reworks some commentary to make the
   code easier to follow.

 - The series "page_counter cleanup and size reduction" from Shakeel
   Butt cleans up the page_counter code and fixes a size increase which
   we accidentally added late last year.

 - The series "Add a command line option that enables control of how
   many threads should be used to allocate huge pages" from Thomas
   Prescher does that. It allows the careful operator to significantly
   reduce boot time by tuning the parallalization of huge page
   initialization.

 - The series "Fix calculations in trace_balance_dirty_pages() for cgwb"
   from Tang Yizhou fixes the tracing output from the dirty page
   balancing code.

 - The series "mm/damon: make allow filters after reject filters useful
   and intuitive" from SeongJae Park improves the handling of allow and
   reject filters. Behaviour is made more consistent and the documention
   is updated accordingly.

 - The series "Switch zswap to object read/write APIs" from Yosry Ahmed
   updates zswap to the new object read/write APIs and thus permits the
   removal of some legacy code from zpool and zsmalloc.

 - The series "Some trivial cleanups for shmem" from Baolin Wang does as
   it claims.

 - The series "fs/dax: Fix ZONE_DEVICE page reference counts" from
   Alistair Popple regularizes the weird ZONE_DEVICE page refcount
   handling in DAX, permittig the removal of a number of special-case
   checks.

 - The series "refactor mremap and fix bug" from Lorenzo Stoakes is a
   preparatoty refactoring and cleanup of the mremap() code.

 - The series "mm: MM owner tracking for large folios (!hugetlb) +
   CONFIG_NO_PAGE_MAPCOUNT" from David Hildenbrand reworks the manner in
   which we determine whether a large folio is known to be mapped
   exclusively into a single MM.

 - The series "mm/damon: add sysfs dirs for managing DAMOS filters based
   on handling layers" from SeongJae Park adds a couple of new sysfs
   directories to ease the management of DAMON/DAMOS filters.

 - The series "arch, mm: reduce code duplication in mem_init()" from
   Mike Rapoport consolidates many per-arch implementations of
   mem_init() into code generic code, where that is practical.

 - The series "mm/damon/sysfs: commit parameters online via
   damon_call()" from SeongJae Park continues the cleaning up of sysfs
   access to DAMON internal data.

 - The series "mm: page_ext: Introduce new iteration API" from Luiz
   Capitulino reworks the page_ext initialization to fix a boot-time
   crash which was observed with an unusual combination of compile and
   cmdline options.

 - The series "Buddy allocator like (or non-uniform) folio split" from
   Zi Yan reworks the code to split a folio into smaller folios. The
   main benefit is lessened memory consumption: fewer post-split folios
   are generated.

 - The series "Minimize xa_node allocation during xarry split" from Zi
   Yan reduces the number of xarray xa_nodes which are generated during
   an xarray split.

 - The series "drivers/base/memory: Two cleanups" from Gavin Shan
   performs some maintenance work on the drivers/base/memory code.

 - The series "Add tracepoints for lowmem reserves, watermarks and
   totalreserve_pages" from Martin Liu adds some more tracepoints to the
   page allocator code.

 - The series "mm/madvise: cleanup requests validations and
   classifications" from SeongJae Park cleans up some warts which
   SeongJae observed during his earlier madvise work.

 - The series "mm/hwpoison: Fix regressions in memory failure handling"
   from Shuai Xue addresses two quite serious regressions which Shuai
   has observed in the memory-failure implementation.

 - The series "mm: reliable huge page allocator" from Johannes Weiner
   makes huge page allocations cheaper and more reliable by reducing
   fragmentation.

 - The series "Minor memcg cleanups & prep for memdescs" from Matthew
   Wilcox is preparatory work for the future implementation of memdescs.

 - The series "track memory used by balloon drivers" from Nico Pache
   introduces a way to track memory used by our various balloon drivers.

 - The series "mm/damon: introduce DAMOS filter type for active pages"
   from Nhat Pham permits users to filter for active/inactive pages,
   separately for file and anon pages.

 - The series "Adding Proactive Memory Reclaim Statistics" from Hao Jia
   separates the proactive reclaim statistics from the direct reclaim
   statistics.

 - The series "mm/vmscan: don't try to reclaim hwpoison folio" from
   Jinjiang Tu fixes our handling of hwpoisoned pages within the reclaim
   code.

* tag 'mm-stable-2025-03-30-16-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (431 commits)
  mm/page_alloc: remove unnecessary __maybe_unused in order_to_pindex()
  x86/mm: restore early initialization of high_memory for 32-bits
  mm/vmscan: don't try to reclaim hwpoison folio
  mm/hwpoison: introduce folio_contain_hwpoisoned_page() helper
  cgroup: docs: add pswpin and pswpout items in cgroup v2 doc
  mm: vmscan: split proactive reclaim statistics from direct reclaim statistics
  selftests/mm: speed up split_huge_page_test
  selftests/mm: uffd-unit-tests support for hugepages > 2M
  docs/mm/damon/design: document active DAMOS filter type
  mm/damon: implement a new DAMOS filter type for active pages
  fs/dax: don't disassociate zero page entries
  MM documentation: add "Unaccepted" meminfo entry
  selftests/mm: add commentary about 9pfs bugs
  fork: use __vmalloc_node() for stack allocation
  docs/mm: Physical Memory: Populate the "Zones" section
  xen: balloon: update the NR_BALLOON_PAGES state
  hv_balloon: update the NR_BALLOON_PAGES state
  balloon_compaction: update the NR_BALLOON_PAGES state
  meminfo: add a per node counter for balloon drivers
  mm: remove references to folio in __memcg_kmem_uncharge_page()
  ...
2025-04-01 09:29:18 -07:00