We're seeing livelocks that appear to be due to
bch2_btree_key_cache_scan repeatedly scanning and blocking other tasks
from using the key cache lock - we probably shouldn't be reporting
objects that can't actually be freed yet.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
struct bch_fs *c = container_of(shrink, struct bch_fs,
btree_key_cache.shrink);
struct btree_key_cache *bc = &c->btree_key_cache;
+ long nr = atomic_long_read(&bc->nr_keys) -
+ atomic_long_read(&bc->nr_dirty);
- return atomic_long_read(&bc->nr_keys);
+ return max(0L, nr);
}
void bch2_fs_btree_key_cache_exit(struct btree_key_cache *bc)