diff options
| author | Vladimir Davydov <vdavydov@parallels.com> | 2014-05-06 23:49:59 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-05-07 00:04:58 +0400 |
| commit | 93030d83b9e1079836d82b46ab3ec671b1fdb623 (patch) | |
| tree | 3d67394036bae1fe07c4990fad5fec1668c41213 | |
| parent | 35738392b6c050625e41cc6b941f9828794149b3 (diff) | |
| download | linux-93030d83b9e1079836d82b46ab3ec671b1fdb623.tar.xz | |
slub: fix memcg_propagate_slab_attrs
After creating a cache for a memcg we should initialize its sysfs attrs
with the values from its parent. That's what memcg_propagate_slab_attrs
is for. Currently it's broken - we clearly muddled root-vs-memcg caches
there. Let's fix it up.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/slub.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/mm/slub.c b/mm/slub.c index 5e234f1f8853..042a47b4d0f5 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -5071,15 +5071,18 @@ static void memcg_propagate_slab_attrs(struct kmem_cache *s) #ifdef CONFIG_MEMCG_KMEM int i; char *buffer = NULL; + struct kmem_cache *root_cache; - if (!is_root_cache(s)) + if (is_root_cache(s)) return; + root_cache = s->memcg_params->root_cache; + /* * This mean this cache had no attribute written. Therefore, no point * in copying default values around */ - if (!s->max_attr_size) + if (!root_cache->max_attr_size) return; for (i = 0; i < ARRAY_SIZE(slab_attrs); i++) { @@ -5101,7 +5104,7 @@ static void memcg_propagate_slab_attrs(struct kmem_cache *s) */ if (buffer) buf = buffer; - else if (s->max_attr_size < ARRAY_SIZE(mbuf)) + else if (root_cache->max_attr_size < ARRAY_SIZE(mbuf)) buf = mbuf; else { buffer = (char *) get_zeroed_page(GFP_KERNEL); @@ -5110,7 +5113,7 @@ static void memcg_propagate_slab_attrs(struct kmem_cache *s) buf = buffer; } - attr->show(s->memcg_params->root_cache, buf); + attr->show(root_cache, buf); attr->store(s, buf, strlen(buf)); } |