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memcg: use __mod_memcg_state in drain_obj_stock

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For non-PREEMPT_RT kernels, drain_obj_stock() is always called with irq
disabled, so we can use __mod_memcg_state() instead of mod_memcg_state(). 
For PREEMPT_RT, we need to add memcg_stats_[un]lock in
__mod_memcg_state().

Link: https://lkml.kernel.org/r/20250404013913.1663035-8-shakeel.butt@linux.dev
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Shakeel Butt 2025-04-03 18:39:11 -07:00 committed by Andrew Morton
parent ae51c775aa
commit 42a1910cfd
1 changed files with 3 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
mm/memcontrol.c
View file

@ -710,10 +710,12 @@ void __mod_memcg_state(struct mem_cgroup *memcg, enum memcg_stat_item idx,
if (WARN_ONCE(BAD_STAT_IDX(i), "%s: missing stat item %d\n", __func__, idx))
return;
memcg_stats_lock();
__this_cpu_add(memcg->vmstats_percpu->state[i], val);
val = memcg_state_val_in_pages(idx, val);
memcg_rstat_updated(memcg, val);
trace_mod_memcg_state(memcg, idx, val);
memcg_stats_unlock();
}
#ifdef CONFIG_MEMCG_V1
@ -2866,7 +2868,7 @@ static void drain_obj_stock(struct memcg_stock_pcp *stock)
memcg = get_mem_cgroup_from_objcg(old);
mod_memcg_state(memcg, MEMCG_KMEM, -nr_pages);
__mod_memcg_state(memcg, MEMCG_KMEM, -nr_pages);
memcg1_account_kmem(memcg, -nr_pages);
if (!mem_cgroup_is_root(memcg))
memcg_uncharge(memcg, nr_pages);