diff options
| author | Yang Shi <[email protected]> | 2019-12-17 20:51:52 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2019-12-17 20:59:59 -0800 |
| commit | 42a9a53bb394a1de2247ef78f0b802ae86798122 (patch) | |
| tree | 140c04d850eebf5054440641d3074447108f8f8c | |
| parent | 253a496d8e57275d458eb3c988470525b0b2c545 (diff) | |
mm: vmscan: protect shrinker idr replace with CONFIG_MEMCG
Since commit 0a432dcbeb32 ("mm: shrinker: make shrinker not depend on
memcg kmem"), shrinkers' idr is protected by CONFIG_MEMCG instead of
CONFIG_MEMCG_KMEM, so it makes no sense to protect shrinker idr replace
with CONFIG_MEMCG_KMEM.
And in the CONFIG_MEMCG && CONFIG_SLOB case, shrinker_idr contains only
shrinker, and it is deferred_split_shrinker. But it is never actually
called, since idr_replace() is never compiled due to the wrong #ifdef.
The deferred_split_shrinker all the time is staying in half-registered
state, and it's never called for subordinate mem cgroups.
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 0a432dcbeb32 ("mm: shrinker: make shrinker not depend on memcg kmem")
Signed-off-by: Yang Shi <[email protected]>
Reviewed-by: Kirill Tkhai <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Shakeel Butt <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: <[email protected]> [5.4+]
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/vmscan.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 74e8edce83ca..572fb17c6273 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -387,7 +387,7 @@ void register_shrinker_prepared(struct shrinker *shrinker) { down_write(&shrinker_rwsem); list_add_tail(&shrinker->list, &shrinker_list); -#ifdef CONFIG_MEMCG_KMEM +#ifdef CONFIG_MEMCG if (shrinker->flags & SHRINKER_MEMCG_AWARE) idr_replace(&shrinker_idr, shrinker, shrinker->id); #endif |