Messages in this thread Patch in this message | | | From | linke li <> | Subject | [PATCH] mm/slub: mark racy access on slab->freelist | Date | Sat, 27 Apr 2024 16:51:54 +0800 |
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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: linke li <lilinke99@qq.com> --- mm/slub.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/slub.c b/mm/slub.c index 0d700f6ca547..bb0e05a321e9 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2813,7 +2813,7 @@ 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; } -- 2.39.3 (Apple Git-146)
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