Commit 844776cb authored by linke li's avatar linke li Committed by Vlastimil Babka
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mm/slub: mark racy access on slab->freelist 



In deactivate_slab(), slab->freelist can be changed concurrently. Mark
data race on slab->freelist as benign using READ_ONCE.

This patch is aimed at reducing the number of benign races reported by
KCSAN in order to focus future debugging effort on harmful races.

Signed-off-by: default avatarlinke li <lilinke99@qq.com>
Signed-off-by: default avatarVlastimil Babka <vbabka@suse.cz>
parent b3d8a8e8

mm/slub.c

+1 −1
Original line number Diff line number Diff line
@@ -2806,7 +2806,7 @@ static void deactivate_slab(struct kmem_cache *s, struct slab *slab, 
	struct slab new;

	struct slab old;



	if (slab->freelist) {

	if (READ_ONCE(slab->freelist)) {

		stat(s, DEACTIVATE_REMOTE_FREES);

		tail = DEACTIVATE_TO_TAIL;

	}