diff options
| -rw-r--r-- | fs/bcachefs/btree_key_cache.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/bcachefs/btree_key_cache.c b/fs/bcachefs/btree_key_cache.c index 2ad3d27c91e6..2d3c0d45c37f 100644 --- a/fs/bcachefs/btree_key_cache.c +++ b/fs/bcachefs/btree_key_cache.c @@ -915,6 +915,14 @@ static unsigned long bch2_btree_key_cache_count(struct shrinker *shrink, long nr = atomic_long_read(&bc->nr_keys) - atomic_long_read(&bc->nr_dirty); + /* + * Avoid hammering our shrinker too much if it's nearly empty - the + * shrinker code doesn't take into account how big our cache is, if it's + * mostly empty but the system is under memory pressure it causes nasty + * lock contention: + */ + nr -= 128; + return max(0L, nr); } |