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de85024b34839e9c476b6f93c3104e920bd9d270
linux/mm
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Kairui Song de85024b34 mm, swap: remove workaround for unsynchronized swap map cache state 
Remove the "skip if exists" check from commit a65b0e7607 ("zswap: make
shrinking memcg-aware").  It was needed because there is a tiny time
window between setting the SWAP_HAS_CACHE bit and actually adding the
folio to the swap cache.  If a user is trying to add the folio into the
swap cache but another user was interrupted after setting SWAP_HAS_CACHE
but hasn't added the folio to the swap cache yet, it might lead to a
deadlock.

We have moved the bit setting to the same critical section as adding the
folio, so this is no longer needed.  Remove it and clean it up.

Link: https://lkml.kernel.org/r/20251220-swap-table-p2-v5-13-8862a265a033@tencent.com
Signed-off-by: Kairui Song <kasong@tencent.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Cc: Yosry Ahmed <yosry.ahmed@linux.dev>
Cc: Deepanshu Kartikey <kartikey406@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <ryncsn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-01-31 14:22:56 -08:00
..
damon
mm/damon: rename min_sz_region of damon_ctx to min_region_sz
2026-01-31 14:22:47 -08:00
kasan
kasan: remove unnecessary sync argument from start_report()
2026-01-31 14:22:52 -08:00
kfence
mm: replace use of system_unbound_wq with system_dfl_wq
2026-01-31 14:22:39 -08:00
kmsan
mm: kmsan: add test_uninit_page
2026-01-26 20:02:32 -08:00
tests
sparc/mm: export symbols for lazy_mmu_mode KUnit tests
2026-01-31 14:22:40 -08:00
backing-dev.c
mm: add WQ_PERCPU to alloc_workqueue users
2026-01-31 14:22:39 -08:00
balloon.c
mm: rename CONFIG_BALLOON_COMPACTION to CONFIG_BALLOON_MIGRATION
2026-01-31 14:22:36 -08:00
bootmem_info.c
…
cma_debug.c
mm: cma: simplify cma_maxchunk_get()
2025-07-24 19:12:36 -07:00
cma_sysfs.c
…
cma.c
mm: cma: add cma_alloc_frozen{_compound}()
2026-01-26 20:02:28 -08:00
cma.h
mm: cma: set early_pfn and bitmap as a union in cma_memrange
2025-05-22 14:55:36 -07:00
compaction.c
mm/compaction: fix low_pfn advance on isolating hugetlb
2025-09-28 11:51:29 -07:00
debug_page_alloc.c
mm/debug_page_alloc: improve error message for invalid guardpage minorder
2025-05-12 23:50:38 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm: debug_vm_pgtable: add debug_vm_pgtable_free_huge_page()
2026-01-26 20:02:27 -08:00
debug.c
mm: constify __dump_folio() arguments
2025-11-20 13:43:57 -08:00
dmapool_test.c
…
dmapool.c
docs: dma-api: replace consistent with coherent
2025-07-01 13:25:36 -06:00
early_ioremap.c
mm/early_ioremap: clean up the use of WARN() for debugging
2026-01-26 20:02:26 -08:00
execmem.c
mm: remove PMD alignment constraint in execmem_vmalloc()
2025-09-28 11:51:31 -07:00
fadvise.c
mm: rename filemap_fdatawrite_range_kick to filemap_flush_range
2025-10-29 15:50:42 +01:00
fail_page_alloc.c
…
failslab.c
…
filemap.c
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2025-12-05 17:01:20 -08:00
folio-compat.c
…
gup_test.c
…
gup_test.h
…
gup.c
mm/gup: remove no longer used gup_fast_undo_dev_pagemap
2026-01-20 19:24:49 -08:00
highmem.c
mm/highmem: fix __kmap_to_page() build error
2026-01-31 14:22:38 -08:00
hmm.c
Merge tag 'mm-stable-2025-12-03-21-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-12-05 13:52:43 -08:00
huge_memory.c
migrate: replace RMP_ flags with TTU_ flags
2026-01-26 20:02:33 -08:00
hugetlb_cgroup.c
mm/hugetlb_cgroup: fix -Wformat-truncation warning
2026-01-20 19:24:48 -08:00
hugetlb_cma.c
mm: hugetlb_cma: mark hugetlb_cma{_only} as __ro_after_init
2026-01-31 14:22:43 -08:00
hugetlb_cma.h
mm: hugetlb: allocate frozen pages for gigantic allocation
2026-01-26 20:02:28 -08:00
hugetlb_internal.h
mm/hugetlb: extract sysctl into hugetlb_sysctl.c
2025-11-20 13:43:57 -08:00
hugetlb_sysctl.c
mm, hugetlb: implement movable_gigantic_pages sysctl
2026-01-20 19:24:50 -08:00
hugetlb_sysfs.c
mm/hugetlb: extract sysfs into hugetlb_sysfs.c
2025-11-20 13:43:57 -08:00
hugetlb_vmemmap.c
Revert "mm/hugetlb: deal with multiple calls to hugetlb_bootmem_alloc"
2026-01-26 20:02:20 -08:00
hugetlb_vmemmap.h
…
hugetlb.c
hugetlb: increase hugepage reservations when using node-specific "hugepages=" cmdline
2026-01-31 14:22:52 -08:00
hwpoison-inject.c
mm/hwpoison: decouple hwpoison_filter from mm/memory-failure.c
2025-09-21 14:22:21 -07:00
init-mm.c
mm: rename cpu_bitmap field to flexible_array
2026-01-19 12:30:00 -08:00
internal.h
mm: cma: add cma_alloc_frozen{_compound}()
2026-01-26 20:02:28 -08:00
interval_tree.c
…
ioremap.c
…
Kconfig
mm: rename CONFIG_MEMORY_BALLOON -> CONFIG_BALLOON
2026-01-31 14:22:36 -08:00
Kconfig.debug
mm: fix DEBUG_RODATA_TEST indentation in Kconfig
2025-11-29 10:41:09 -08:00
khugepaged.c
mm/khugepaged: make khugepaged_collapse_control static
2026-01-31 14:22:30 -08:00
kmemleak.c
mm: fix possible deadlock in kmemleak
2025-09-01 17:11:37 -07:00
ksm.c
mm/ksm: fix pte_unmap_unlock of wrong address in break_ksm_pmd_entry
2025-12-23 11:23:17 -08:00
list_lru.c
memcg: introduce private id API for in-kernel users
2026-01-26 20:02:23 -08:00
maccess.c
mm: unexport globally copy_to_kernel_nofault
2025-07-09 22:42:22 -07:00
madvise.c
mm/vma: add and use vma_assert_stabilised()
2026-01-31 14:22:51 -08:00
Makefile
mm: rename CONFIG_MEMORY_BALLOON -> CONFIG_BALLOON
2026-01-31 14:22:36 -08:00
mapping_dirty_helpers.c
mm/dirty: replace READ_ONCE() with pudp_get()
2025-11-16 17:27:58 -08:00
memblock.c
mm: fix minor spelling mistakes in comments
2026-01-20 19:24:48 -08:00
memcontrol-v1.c
memcg: introduce private id API for in-kernel users
2026-01-26 20:02:23 -08:00
memcontrol-v1.h
memcg: introduce private id API for in-kernel users
2026-01-26 20:02:23 -08:00
memcontrol.c
mm: replace use of system_unbound_wq with system_dfl_wq
2026-01-31 14:22:39 -08:00
memfd_luo.c
mm: memfd_luo: restore and free memfd_luo_ser on failure
2026-01-26 19:03:47 -08:00
memfd.c
memfd: export alloc_file()
2026-01-26 19:03:47 -08:00
memory_hotplug.c
mm: rename CONFIG_BALLOON_COMPACTION to CONFIG_BALLOON_MIGRATION
2026-01-31 14:22:36 -08:00
memory-failure.c
Merge branch 'mm-hotfixes-stable' into mm-stable to pick up "mm/shmem,
2026-01-31 14:20:03 -08:00
memory-tiers.c
mm/vmscan: add tracepoint and reason for kswapd_failures reset
2026-01-31 14:22:38 -08:00
memory.c
mm, swap: free the swap cache after folio is mapped
2026-01-31 14:22:54 -08:00
mempolicy.c
mm: use nodes_and() return value to simplify client code
2026-01-26 20:02:36 -08:00
mempool.c
Merge tag 'slab-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
2025-12-03 11:53:47 -08:00
memremap.c
mm/zone_device: reinitialize large zone device private folios
2026-01-26 19:03:48 -08:00
memtest.c
…
migrate_device.c
mm: fix minor spelling mistakes in comments
2026-01-20 19:24:48 -08:00
migrate.c
mm: rename CONFIG_BALLOON_COMPACTION to CONFIG_BALLOON_MIGRATION
2026-01-31 14:22:36 -08:00
mincore.c
mm: replace remaining pte_to_swp_entry() with softleaf_from_pte()
2025-11-24 15:08:52 -08:00
mlock.c
mm: update vma_modify_flags() to handle residual flags, document
2025-11-20 13:43:58 -08:00
mm_init.c
Merge branch 'mm-hotfixes-stable' into mm-stable to pick up "mm/shmem,
2026-01-31 14:20:03 -08:00
mm_slot.h
…
mmap_lock.c
mm/vma: improve and document __is_vma_write_locked()
2026-01-31 14:22:51 -08:00
mmap.c
mm: softdirty: add pgtable_supports_soft_dirty()
2025-11-24 15:08:54 -08:00
mmu_gather.c
mm/mmu_gather: remove @delay_remap of __tlb_remove_page_size()
2026-01-20 19:24:54 -08:00
mmu_notifier.c
Update Christoph's Email address and make it consistent
2025-05-12 23:50:31 -07:00
mmzone.c
mm: introduce memdesc_flags_t
2025-09-13 16:55:07 -07:00
mprotect.c
mm: introduce generic lazy_mmu helpers
2026-01-20 19:24:33 -08:00
mremap.c
mm: fix minor spelling mistakes in comments
2026-01-20 19:24:48 -08:00
mseal.c
mm: fix minor spelling mistakes in comments
2026-01-20 19:24:48 -08:00
msync.c
…
nommu.c
mm/nommu: convert kobjsize() to folios
2025-09-13 16:54:46 -07:00
numa_emulation.c
mm: numa,memblock: Use SZ_1M macro to denote bytes to MB conversion
2025-08-20 16:31:23 +03:00
numa_memblks.c
mm: fix minor spelling mistakes in comments
2026-01-20 19:24:48 -08:00
numa.c
mm/numa: remove unnecessary local variable in alloc_node_data()
2025-05-12 23:50:38 -07:00
oom_kill.c
mm: fix OOM killer inaccuracy on large many-core systems
2026-01-31 14:22:37 -08:00
page_alloc.c
mm: page_alloc: optimize pfn_range_valid_contig()
2026-01-31 14:22:42 -08:00
page_counter.c
…
page_ext.c
mm,page_ext: derive the node from the pfn
2025-07-13 16:38:16 -07:00
page_frag_cache.c
…
page_idle.c
mm/rmap: extend rmap and migration support device-private entries
2025-11-24 15:08:48 -08:00
page_io.c
mm: fix minor spelling mistakes in comments
2026-01-20 19:24:48 -08:00
page_isolation.c
mm: page_isolation: introduce page_is_unmovable()
2026-01-31 14:22:42 -08:00
page_owner.c
mm/page_owner: fix memory leak in page_owner_stack_fops->release()
2025-12-23 11:23:17 -08:00
page_poison.c
…
page_reporting.c
mm: fix minor spelling mistakes in comments
2026-01-20 19:24:48 -08:00
page_reporting.h
…
page_table_check.c
mm: provide address parameter to p{te,md,ud}_user_accessible_page()
2026-01-26 20:02:35 -08:00
page_vma_mapped.c
mm: eliminate further swapops predicates
2025-11-24 15:08:52 -08:00
page-writeback.c
mm/block/fs: remove laptop_mode
2026-01-20 19:24:47 -08:00
pagewalk.c
mm/pagewalk: use min() to simplify the code
2026-01-31 14:22:52 -08:00
percpu-internal.h
…
percpu-km.c
mm/mm/percpu-km: drop nth_page() usage within single allocation
2025-09-21 14:22:04 -07:00
percpu-stats.c
mm: remove outdated filename comment in percpu-stats.c
2025-07-13 16:38:23 -07:00
percpu-vm.c
kmsan: remove hard-coded GFP_KERNEL flags
2025-11-16 17:27:54 -08:00
percpu.c
percpu: add double free check to pcpu_free_area()
2026-01-31 14:22:52 -08:00
pgalloc-track.h
…
pgtable-generic.c
mm/huge_memory: add device-private THP support to PMD operations
2025-11-24 15:08:48 -08:00
process_vm_access.c
…
pt_reclaim.c
treewide: include linux/pgalloc.h instead of asm/pgalloc.h
2025-11-16 17:28:25 -08:00
ptdump.c
mm/ptdump: replace READ_ONCE() with standard page table accessors
2025-11-16 17:27:52 -08:00
readahead.c
mm/filemap: Add NUMA mempolicy support to filemap_alloc_folio()
2025-10-20 06:30:25 -07:00
rmap.c
mm/rmap: separate out fork-only logic on anon_vma_clone()
2026-01-26 20:02:22 -08:00
rodata_test.c
…
secretmem.c
Merge tag 'mm-stable-2025-12-03-21-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-12-05 13:52:43 -08:00
shmem_quota.c
…
shmem.c
mm/shmem, swap: remove SWAP_MAP_SHMEM
2026-01-31 14:22:55 -08:00
show_mem.c
mm/vmscan: add tracepoint and reason for kswapd_failures reset
2026-01-31 14:22:38 -08:00
shrinker_debug.c
memcg: rename mem_cgroup_ino() to mem_cgroup_id()
2026-01-26 20:02:25 -08:00
shrinker.c
…
shuffle.c
…
shuffle.h
…
slab_common.c
Merge tag 'slab-for-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
2025-12-11 08:54:08 +09:00
slab.h
mm/slab: introduce kvfree_rcu_barrier_on_cache() for cache destruction
2025-12-07 18:09:54 +01:00
slub.c
mm: add WQ_PERCPU to alloc_workqueue users
2026-01-31 14:22:39 -08:00
sparse-vmemmap.c
mm: replace READ_ONCE() with standard page table accessors
2025-11-16 17:27:56 -08:00
sparse.c
mm/memory_hotplug: Remove MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers
2025-10-14 14:24:53 +02:00
swap_cgroup.c
…
swap_state.c
mm, swap: remove workaround for unsynchronized swap map cache state
2026-01-31 14:22:56 -08:00
swap_table.h
mm, swap: use a single page for swap table when the size fits
2025-09-21 14:22:25 -07:00
swap.c
mm: fix minor spelling mistakes in comments
2026-01-20 19:24:48 -08:00
swap.h
mm, swap: remove workaround for unsynchronized swap map cache state
2026-01-31 14:22:56 -08:00
swapfile.c
mm, swap: use swap cache as the swap in synchronize layer
2026-01-31 14:22:56 -08:00
truncate.c
Merge tag 'vfs-6.19-rc1.folio' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2025-12-01 10:26:38 -08:00
usercopy.c
usercopy: Remove folio references from check_heap_object()
2025-11-13 11:01:08 +01:00
userfaultfd.c
mm: fix minor spelling mistakes in comments
2026-01-20 19:24:48 -08:00
util.c
mm: add ability to take further action in vm_area_desc
2025-11-16 17:28:12 -08:00
vma_exec.c
mm: softdirty: add pgtable_supports_soft_dirty()
2025-11-24 15:08:54 -08:00
vma_init.c
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
vma_internal.h
…
vma.c
mm/rmap: separate out fork-only logic on anon_vma_clone()
2026-01-26 20:02:22 -08:00
vma.h
mm: cleanup vma_iter_bulk_alloc
2026-01-20 19:24:50 -08:00
vmalloc.c
Merge branch 'mm-hotfixes-stable' into mm-stable to pick up "mm/shmem,
2026-01-31 14:20:03 -08:00
vmpressure.c
memcg: convert memcg->socket_pressure to u64
2025-07-24 19:12:32 -07:00
vmscan.c
mm, swap: use swap cache as the swap in synchronize layer
2026-01-31 14:22:56 -08:00
vmstat.c
mm: add WQ_PERCPU to alloc_workqueue users
2026-01-31 14:22:39 -08:00
workingset.c
memcg: introduce private id API for in-kernel users
2026-01-26 20:02:23 -08:00
zpdesc.h
mm: zpdesc: minor naming and comment corrections
2025-09-21 14:21:59 -07:00
zsmalloc.c
zsmalloc: introduce SG-list based object read API
2026-01-26 20:02:32 -08:00
zswap.c
mm, swap: remove workaround for unsynchronized swap map cache state
2026-01-31 14:22:56 -08:00