From: Chengming Zhou zhouchengming@bytedance.com
mainline inclusion from mainline-v6.9-rc1 commit a6def11b6dcde5d8f1fcc9e2c0ae71399432b62e category: performance bugzilla: https://gitee.com/openeuler/kernel/issues/I9CSFJ CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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Since debug slab is processed by free_to_partial_list(), and only debug slab which has SLAB_STORE_USER flag would care about the full list, we can remove these unrelated full list manipulations from __slab_free().
Acked-by: Christoph Lameter (Ampere) cl@linux.com Reviewed-by: Vlastimil Babka vbabka@suse.cz Signed-off-by: Chengming Zhou zhouchengming@bytedance.com Signed-off-by: Vlastimil Babka vbabka@suse.cz Signed-off-by: ZhangPeng zhangpeng362@huawei.com --- mm/slub.c | 4 ---- 1 file changed, 4 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c index 07509c40a637..bd6eb0bbdcd3 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3673,7 +3673,6 @@ static void __slab_free(struct kmem_cache *s, struct slab *slab, * then add it. */ if (!kmem_cache_has_cpu_partial(s) && unlikely(!prior)) { - remove_full(s, n, slab); add_partial(n, slab, DEACTIVATE_TO_TAIL); stat(s, FREE_ADD_PARTIAL); } @@ -3687,9 +3686,6 @@ static void __slab_free(struct kmem_cache *s, struct slab *slab, */ remove_partial(n, slab); stat(s, FREE_REMOVE_PARTIAL); - } else { - /* Slab must be on the full list */ - remove_full(s, n, slab); }
spin_unlock_irqrestore(&n->list_lock, flags);