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mm/slab: Optimize the code logic in find_mergeable()

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We can first assess the flags, if it's unmergeable, there's no need
to calculate the size and align.

Signed-off-by: Xavier <xavier_qy@163.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Xavier 2024-09-04 15:40:37 +08:00 committed by Vlastimil Babka
parent 59090e479a
commit e02147cb70
1 changed files with 4 additions and 3 deletions
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7
mm/slab_common.c
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@ -186,14 +186,15 @@ struct kmem_cache *find_mergeable(unsigned int size, unsigned int align,
if (ctor)
return NULL;
size = ALIGN(size, sizeof(void *));
align = calculate_alignment(flags, align, size);
size = ALIGN(size, align);
flags = kmem_cache_flags(flags, name);
if (flags & SLAB_NEVER_MERGE)
return NULL;
size = ALIGN(size, sizeof(void *));
align = calculate_alignment(flags, align, size);
size = ALIGN(size, align);
list_for_each_entry_reverse(s, &slab_caches, list) {
if (slab_unmergeable(s))
continue;