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| author |   Yang Shi <yang.shi@linux.alibaba.com> | 2019-09-23 15:38:12 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-24 15:54:11 -0700 |
| commit | 0a432dcbeb32edcd211a5d8f7847d0da7642a8b4 (patch) | |
| tree | 1848177fb8ebc6ee5f98623ef4672c89cc52f8b8 /include/linux/shrinker.h | |
| parent | mm: move mem_cgroup_uncharge out of __page_cache_release() (diff) | |
| download | wireguard-linux-0a432dcbeb32edcd211a5d8f7847d0da7642a8b4.tar.xz wireguard-linux-0a432dcbeb32edcd211a5d8f7847d0da7642a8b4.zip | |
mm: shrinker: make shrinker not depend on memcg kmem
Currently shrinker is just allocated and can work when memcg kmem is
enabled. But, THP deferred split shrinker is not slab shrinker, it
doesn't make too much sense to have such shrinker depend on memcg kmem.
It should be able to reclaim THP even though memcg kmem is disabled.
Introduce a new shrinker flag, SHRINKER_NONSLAB, for non-slab shrinker.
When memcg kmem is disabled, just such shrinkers can be called in
shrinking memcg slab.
[yang.shi@linux.alibaba.com: add comment]
Link: http://lkml.kernel.org/r/1566496227-84952-4-git-send-email-yang.shi@linux.alibaba.com
Link: http://lkml.kernel.org/r/1565144277-36240-4-git-send-email-yang.shi@linux.alibaba.com
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/shrinker.h')
| -rw-r--r-- | include/linux/shrinker.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index 9443cafd1969..0f80123650e2 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -69,7 +69,7 @@ struct shrinker { /* These are for internal use */ struct list_head list; -#ifdef CONFIG_MEMCG_KMEM +#ifdef CONFIG_MEMCG /* ID in shrinker_idr */ int id; #endif @@ -81,6 +81,11 @@ struct shrinker { /* Flags */ #define SHRINKER_NUMA_AWARE (1 << 0) #define SHRINKER_MEMCG_AWARE (1 << 1) +/* + * It just makes sense when the shrinker is also MEMCG_AWARE for now, + * non-MEMCG_AWARE shrinker should not have this flag set. + */ +#define SHRINKER_NONSLAB (1 << 2) extern int prealloc_shrinker(struct shrinker *shrinker); extern void register_shrinker_prepared(struct shrinker *shrinker); |