page_counter: track failcnt only for legacy cgroups

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Currently page_counter tracks failcnt for counters used by v1 and v2
controllers.  However failcnt is only exported for v1 deployment and thus
there is no need to maintain it in v2.  The oom report does expose failcnt
for memory and swap in v2 but v2 already maintains MEMCG_MAX and
MEMCG_SWAP_MAX event counters which can be used.

Link: https://lkml.kernel.org/r/20250228075808.207484-3-shakeel.butt@linux.dev
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin (Cruise) <roman.gushchin@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Shakeel Butt 2025-02-27 23:58:07 -08:00 • committed by Andrew Morton

parent 645207a670

commit 0e2759afca

4 changed files with 30 additions and 21 deletions

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4

include/linux/page_counter.h

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31

mm/hugetlb_cgroup.c

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12

mm/memcontrol.c

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4

mm/page_counter.c

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