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[Deepin-Kernel-SIG] [linux 7.2.y] mm/list_lru: don't copy stale shrinker id from non-memcg-aware shrinkers #2127

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Merged
opsiff merged 1 commit into from
Sep 7, 2026
+6 −1
Merged

[Deepin-Kernel-SIG] [linux 7.2.y] mm/list_lru: don't copy stale shrinker id from non-memcg-aware shrinkers #2127

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7 changes: 6 additions & 1 deletion mm/list_lru.c
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Original file line number Diff line number Diff line change
Expand Up @@ -667,7 +667,12 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware, struct shrinker *shr
int i;

#ifdef CONFIG_MEMCG
if (shrinker)
/*
* If the shrinker fell back to being non-memcg-aware (e.g. with
* cgroup.memory=nokmem), its id was never assigned and holds a
* stale 0. Don't let set_shrinker_bit() act on it.
*/
if (shrinker && (shrinker->flags & SHRINKER_MEMCG_AWARE))
lru->shrinker_id = shrinker->id;
else
lru->shrinker_id = -1;
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