bcachefs: discard path uses unlock_long()

Some (bad) devices can have really terrible discard latency; we don't
want them blocking memory reclaim and causing warnings.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/alloc_background.c b/fs/bcachefs/alloc_background.c
index 10704f2..fd3e175 100644 (file)
--- a/fs/bcachefs/alloc_background.c
+++ b/fs/bcachefs/alloc_background.c
@@ -1715,7 +1715,7 @@ static int bch2_discard_one_bucket(struct btree_trans *trans,
                 * This works without any other locks because this is the only
                 * thread that removes items from the need_discard tree
                 */
-               bch2_trans_unlock(trans);
+               bch2_trans_unlock_long(trans);
                blkdev_issue_discard(ca->disk_sb.bdev,
                                     k.k->p.offset * ca->mi.bucket_size,
                                     ca->mi.bucket_size,