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slab: fix the alias count (via sysfs) of slab cache

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We mark some slab caches (e.g.  kmem_cache_node) as unmergeable by
setting refcount to -1, and their alias should be 0, not refcount-1, so
correct it here.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Gu Zheng 2014-08-06 16:04:51 -07:00 committed by Linus Torvalds
parent 0aa9a13d80
commit 4307c14f3c
1 changed files with 1 additions and 1 deletions
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mm/slub.c
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@ -4466,7 +4466,7 @@ SLAB_ATTR_RO(ctor);
static ssize_t aliases_show(struct kmem_cache *s, char *buf) static ssize_t aliases_show(struct kmem_cache *s, char *buf)
{ {
return sprintf(buf, "%d\n", s->refcount - 1); return sprintf(buf, "%d\n", s->refcount < 0 ? 0 : s->refcount - 1);
} }
SLAB_ATTR_RO(aliases); SLAB_ATTR_RO(aliases);