diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/super.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index a7d804219bec..cc4537435399 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -22,6 +22,7 @@ #include <linux/namei.h> #include <linux/miscdevice.h> #include <linux/magic.h> +#include <linux/memcontrol.h> #include <linux/slab.h> #include <linux/ratelimit.h> #include <linux/crc32c.h> @@ -2434,6 +2435,15 @@ static long btrfs_nr_cached_objects(struct super_block *sb, struct shrink_contro struct btrfs_fs_info *fs_info = btrfs_sb(sb); const s64 nr = percpu_counter_read_positive(&fs_info->evictable_extent_maps); + /* + * The evictable extent map counter is filesystem-global and does not + * honour sc->memcg, so it is only meaningful on the global (kswapd or + * root direct reclaim) shrink path. Skip the per-memcg iterations of + * shrink_slab_memcg() to avoid queueing duplicate global work. + */ + if (!mem_cgroup_shrink_is_root(sc)) + return 0; + trace_btrfs_extent_map_shrinker_count(fs_info, nr); return nr; |