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mm: memcontrol: update state_local when flushing NMI stats

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flush_nmi_stats() updates state[] for kmem and slab counters but leaves
the corresponding state_local[] counters unchanged.  Local kmem and slab
statistics therefore miss updates collected through the NMI-safe atomic
path.

Update state_local[] together with state[].

Link: https://lore.kernel.org/20260713085053.2916813-1-guopeng.zhang@linux.dev
Fixes: 940b01fc8d ("memcg: nmi safe memcg stats for specific archs")
Signed-off-by: Guopeng Zhang <zhangguopeng@kylinos.cn>
Acked-by: Tao Cui <cuitao@kylinos.cn>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Guopeng Zhang
2026-07-13 16:50:53 +08:00
committed by Andrew Morton
parent 04b09ca57d
commit 72f522bbf4
1 changed files with 5 additions and 0 deletions
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5
mm/memcontrol.c
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@@ -4443,6 +4443,7 @@ static void flush_nmi_stats(struct mem_cgroup *memcg, struct mem_cgroup *parent,
int index = memcg_stats_index(MEMCG_KMEM);
memcg->vmstats->state[index] += kmem;
memcg->vmstats->state_local[index] += kmem;
if (parent)
parent->vmstats->state_pending[index] += kmem;
}
@@ -4460,9 +4461,11 @@ static void flush_nmi_stats(struct mem_cgroup *memcg, struct mem_cgroup *parent,
int index = memcg_stats_index(NR_SLAB_RECLAIMABLE_B);
lstats->state[index] += slab;
lstats->state_local[index] += slab;
if (plstats)
plstats->state_pending[index] += slab;
memcg->vmstats->state[index] += slab;
memcg->vmstats->state_local[index] += slab;
if (parent)
parent->vmstats->state_pending[index] += slab;
}
@@ -4471,9 +4474,11 @@ static void flush_nmi_stats(struct mem_cgroup *memcg, struct mem_cgroup *parent,
int index = memcg_stats_index(NR_SLAB_UNRECLAIMABLE_B);
lstats->state[index] += slab;
lstats->state_local[index] += slab;
if (plstats)
plstats->state_pending[index] += slab;
memcg->vmstats->state[index] += slab;
memcg->vmstats->state_local[index] += slab;
if (parent)
parent->vmstats->state_pending[index] += slab;
}