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| author |   Roman Gushchin <guro@fb.com> | 2020-08-06 23:21:03 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-07 11:33:24 -0700 |
| commit | 4330a26bc4527f1d8918c398ebc983574f761cca (patch) | |
| tree | e6798292398edc018c379bde258024f4b48264f4 /mm/memcontrol.c | |
| parent | mm: memcg/slab: charge individual slab objects instead of pages (diff) | |
| download | linux-dev-4330a26bc4527f1d8918c398ebc983574f761cca.tar.xz linux-dev-4330a26bc4527f1d8918c398ebc983574f761cca.zip | |
mm: memcg/slab: deprecate memory.kmem.slabinfo
Deprecate memory.kmem.slabinfo.
An empty file will be presented if corresponding config options are
enabled.
The interface is implementation dependent, isn't present in cgroup v2, and
is generally useful only for core mm debugging purposes. In other words,
it doesn't provide any value for the absolute majority of users.
A drgn-based replacement can be found in
tools/cgroup/memcg_slabinfo.py. It does support cgroup v1 and v2,
mimics memory.kmem.slabinfo output and also allows to get any
additional information without a need to recompile the kernel.
If a drgn-based solution is too slow for a task, a bpf-based tracing tool
can be used, which can easily keep track of all slab allocations belonging
to a memory cgroup.
Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/20200623174037.3951353-11-guro@fb.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index ab96a120e630..0356e05bc6e6 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5114,9 +5114,6 @@ static struct cftype mem_cgroup_legacy_files[] = { (defined(CONFIG_SLAB) || defined(CONFIG_SLUB_DEBUG)) { .name = "kmem.slabinfo", - .seq_start = memcg_slab_start, - .seq_next = memcg_slab_next, - .seq_stop = memcg_slab_stop, .seq_show = memcg_slab_show, }, #endif |