diff options
| author | Shakeel Butt <[email protected]> | 2018-03-28 16:00:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2018-03-28 13:42:05 -1000 |
| commit | 880cd276dff17ea29e9a8404275c9502b265afa7 (patch) | |
| tree | 535ad8d555b7ef5ed33f8dc9fdb73ec50d53ed54 | |
| parent | 3eb2ce825ea1ad89d20f7a3b5780df850e4be274 (diff) | |
mm, slab: memcg_link the SLAB's kmem_cache
All the root caches are linked into slab_root_caches which was
introduced by the commit 510ded33e075 ("slab: implement slab_root_caches
list") but it missed to add the SLAB's kmem_cache.
While experimenting with opt-in/opt-out kmem accounting, I noticed
system crashes due to NULL dereference inside cache_from_memcg_idx()
while deferencing kmem_cache.memcg_params.memcg_caches. The upstream
clean kernel will not see these crashes but SLAB should be consistent
with SLUB which does linked its boot caches (kmem_cache_node and
kmem_cache) into slab_root_caches.
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 510ded33e075c ("slab: implement slab_root_caches list")
Signed-off-by: Shakeel Butt <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Vladimir Davydov <[email protected]>
Cc: Greg Thelen <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/slab.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/slab.c b/mm/slab.c index 324446621b3e..9095c3945425 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -1283,6 +1283,7 @@ void __init kmem_cache_init(void) nr_node_ids * sizeof(struct kmem_cache_node *), SLAB_HWCACHE_ALIGN, 0, 0); list_add(&kmem_cache->list, &slab_caches); + memcg_link_cache(kmem_cache); slab_state = PARTIAL; /* |