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| author | Roman Gushchin <guro@fb.com> | 2020-08-07 09:21:20 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-07 21:33:25 +0300 |
| commit | c7094406fcb7cdf4fe1de8893f0613b75349773d (patch) | |
| tree | 17ae29ac1e0c8374227bb23e44be0ee5084e6052 /mm/slab.c | |
| parent | 272911a4ad18c48f8bc449a5db945a54987dd687 (diff) | |
| download | linux-c7094406fcb7cdf4fe1de8893f0613b75349773d.tar.xz | |
mm: memcg/slab: deprecate slab_root_caches
Currently there are two lists of kmem_caches:
1) slab_caches, which contains all kmem_caches,
2) slab_root_caches, which contains only root kmem_caches.
And there is some preprocessor magic to have a single list if
CONFIG_MEMCG_KMEM isn't enabled.
It was required earlier because the number of non-root kmem_caches was
proportional to the number of memory cgroups and could reach really big
values. Now, when it cannot exceed the number of root kmem_caches, there
is really no reason to maintain two lists.
We never iterate over the slab_root_caches list on any hot paths, so it's
perfectly fine to iterate over slab_caches and filter out non-root
kmem_caches.
It allows to remove a lot of config-dependent code and two pointers from
the kmem_cache structure.
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/20200623174037.3951353-16-guro@fb.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slab.c')
| -rw-r--r-- | mm/slab.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/mm/slab.c b/mm/slab.c index 0dd6956585dc..f40e5c95e11a 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -1249,7 +1249,6 @@ 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; /* |