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authorVladimir Davydov <vdavydov@parallels.com>2014-04-07 15:39:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-07 16:36:13 -0700
commit84d0ddd6b0e3187d85e609c2d10c36089cf0be04 (patch)
tree9b5fc606816eda4bf2ca5c980a876d149d3e4692
parentb8529907ba35d625fa4b85d3e4dc8021be97c1f3 (diff)
downloadlinux-84d0ddd6b0e3187d85e609c2d10c36089cf0be04.tar.bz2
slub: adjust memcg caches when creating cache alias
Otherwise, kzalloc() called from a memcg won't clear the whole object. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: David Rientjes <rientjes@google.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Glauber Costa <glommer@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/slub.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 7d81afb27048..33939e72bc37 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3748,7 +3748,11 @@ __kmem_cache_alias(const char *name, size_t size, size_t align,
s = find_mergeable(size, align, flags, name, ctor);
if (s) {
+ int i;
+ struct kmem_cache *c;
+
s->refcount++;
+
/*
* Adjust the object sizes so that we clear
* the complete object on kzalloc.
@@ -3756,6 +3760,15 @@ __kmem_cache_alias(const char *name, size_t size, size_t align,
s->object_size = max(s->object_size, (int)size);
s->inuse = max_t(int, s->inuse, ALIGN(size, sizeof(void *)));
+ for_each_memcg_cache_index(i) {
+ c = cache_from_memcg_idx(s, i);
+ if (!c)
+ continue;
+ c->object_size = s->object_size;
+ c->inuse = max_t(int, c->inuse,
+ ALIGN(size, sizeof(void *)));
+ }
+
if (sysfs_slab_alias(s, name)) {
s->refcount--;
s = NULL;