Otherwise, kzalloc() called from a memcg won't clear the whole object.
Signed-off-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
---
mm/slub.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/mm/slub.c b/mm/slub.c
index 8659e7184338..f3d2ef725ed6 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3743,7 +3743,11 @@ __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.
@@ -3751,6 +3755,16 @@ __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 *)));
+ BUG_ON(!is_root_cache(s));
+ 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;
--
1.7.10.4
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