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Add a drgn-based tool to display slab information for a given memcg. Can replace cgroup v1 memory.kmem.slabinfo interface on cgroup v2, but in a more flexiable way. Currently supports only SLUB configuration, but SLAB can be trivially added later. Output example: $ sudo ./tools/cgroup/memcg_slabinfo.py /sys/fs/cgroup/user.slice/user-111017.slice/user\@111017.service shmem_inode_cache 92 92 704 46 8 : tunables 0 0 0 : slabdata 2 2 0 eventpoll_pwq 56 56 72 56 1 : tunables 0 0 0 : slabdata 1 1 0 eventpoll_epi 32 32 128 32 1 : tunables 0 0 0 : slabdata 1 1 0 kmalloc-8 0 0 8 512 1 : tunables 0 0 0 : slabdata 0 0 0 kmalloc-96 0 0 96 42 1 : tunables 0 0 0 : slabdata 0 0 0 kmalloc-2048 0 0 2048 16 8 : tunables 0 0 0 : slabdata 0 0 0 kmalloc-64 128 128 64 64 1 : tunables 0 0 0 : slabdata 2 2 0 mm_struct 160 160 1024 32 8 : tunables 0 0 0 : slabdata 5 5 0 signal_cache 96 96 1024 32 8 : tunables 0 0 0 : slabdata 3 3 0 sighand_cache 45 45 2112 15 8 : tunables 0 0 0 : slabdata 3 3 0 files_cache 138 138 704 46 8 : tunables 0 0 0 : slabdata 3 3 0 task_delay_info 153 153 80 51 1 : tunables 0 0 0 : slabdata 3 3 0 task_struct 27 27 3520 9 8 : tunables 0 0 0 : slabdata 3 3 0 radix_tree_node 56 56 584 28 4 : tunables 0 0 0 : slabdata 2 2 0 btrfs_inode 140 140 1136 28 8 : tunables 0 0 0 : slabdata 5 5 0 kmalloc-1024 64 64 1024 32 8 : tunables 0 0 0 : slabdata 2 2 0 kmalloc-192 84 84 192 42 2 : tunables 0 0 0 : slabdata 2 2 0 inode_cache 54 54 600 27 4 : tunables 0 0 0 : slabdata 2 2 0 kmalloc-128 0 0 128 32 1 : tunables 0 0 0 : slabdata 0 0 0 kmalloc-512 32 32 512 32 4 : tunables 0 0 0 : slabdata 1 1 0 skbuff_head_cache 32 32 256 32 2 : tunables 0 0 0 : slabdata 1 1 0 sock_inode_cache 46 46 704 46 8 : tunables 0 0 0 : slabdata 1 1 0 cred_jar 378 378 192 42 2 : tunables 0 0 0 : slabdata 9 9 0 proc_inode_cache 96 96 672 24 4 : tunables 0 0 0 : slabdata 4 4 0 dentry 336 336 192 42 2 : tunables 0 0 0 : slabdata 8 8 0 filp 697 864 256 32 2 : tunables 0 0 0 : slabdata 27 27 0 anon_vma 644 644 88 46 1 : tunables 0 0 0 : slabdata 14 14 0 pid 1408 1408 64 64 1 : tunables 0 0 0 : slabdata 22 22 0 vm_area_struct 1200 1200 200 40 2 : tunables 0 0 0 : slabdata 30 30 0 Signed-off-by: Roman Gushchin <guro@fb.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Shakeel Butt <shakeelb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Link: http://lkml.kernel.org/r/20200623174037.3951353-20-guro@fb.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.