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authorRoman Gushchin <guro@fb.com>2020-08-07 09:21:17 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 21:33:25 +0300
commit272911a4ad18c48f8bc449a5db945a54987dd687 (patch)
treeff000a4a362687f849c8ee584c817c26bf950796 /mm/slab.h
parentd797b7d05405c519f7b62ea69a75cea1883863b2 (diff)
downloadlinux-272911a4ad18c48f8bc449a5db945a54987dd687.tar.xz
mm: memcg/slab: remove memcg_kmem_get_cache()
The memcg_kmem_get_cache() function became really trivial, so let's just inline it into the single call point: memcg_slab_pre_alloc_hook(). It will make the code less bulky and can also help the compiler to generate a better code. Signed-off-by: Roman Gushchin <guro@fb.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Shakeel Butt <shakeelb@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Tejun Heo <tj@kernel.org> Link: http://lkml.kernel.org/r/20200623174037.3951353-15-guro@fb.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slab.h')
-rw-r--r--mm/slab.h11
1 files changed, 9 insertions, 2 deletions
diff --git a/mm/slab.h b/mm/slab.h
index fd9fcdfb3789..342eac852967 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -365,9 +365,16 @@ static inline struct kmem_cache *memcg_slab_pre_alloc_hook(struct kmem_cache *s,
if (memcg_kmem_bypass())
return s;
- cachep = memcg_kmem_get_cache(s);
- if (is_root_cache(cachep))
+ cachep = READ_ONCE(s->memcg_params.memcg_cache);
+ if (unlikely(!cachep)) {
+ /*
+ * If memcg cache does not exist yet, we schedule it's
+ * asynchronous creation and let the current allocation
+ * go through with the root cache.
+ */
+ queue_work(system_wq, &s->memcg_params.work);
return s;
+ }
objcg = get_obj_cgroup_from_current();
if (!objcg)