diff options
| -rw-r--r-- | fs/btrfs/ctree.c | 4 | ||||
| -rw-r--r-- | fs/btrfs/locking.h | 9 |
2 files changed, 11 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index ecf8bf240d73..884c8b5a0e62 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -3537,7 +3537,7 @@ static noinline int split_node(struct btrfs_trans_handle *trans, btrfs_node_key(c, &disk_key, mid); split = alloc_tree_block_no_bg_flush(trans, root, 0, &disk_key, level, - c->start, 0, BTRFS_NESTING_NORMAL); + c->start, 0, BTRFS_NESTING_SPLIT); if (IS_ERR(split)) return PTR_ERR(split); @@ -4324,7 +4324,7 @@ again: btrfs_item_key(l, &disk_key, mid); right = alloc_tree_block_no_bg_flush(trans, root, 0, &disk_key, 0, - l->start, 0, BTRFS_NESTING_NORMAL); + l->start, 0, BTRFS_NESTING_SPLIT); if (IS_ERR(right)) return PTR_ERR(right); diff --git a/fs/btrfs/locking.h b/fs/btrfs/locking.h index 16563bc486c7..a6b59808e046 100644 --- a/fs/btrfs/locking.h +++ b/fs/btrfs/locking.h @@ -53,6 +53,15 @@ enum btrfs_lock_nesting { BTRFS_NESTING_RIGHT_COW, /* + * When splitting we may push nodes to the left or right, but still use + * the subsequent nodes in our path, keeping our locks on those adjacent + * blocks. Thus when we go to allocate a new split block we've already + * used up all of our available subclasses, so this subclass exists to + * handle this case where we need to allocate a new split block. + */ + BTRFS_NESTING_SPLIT, + + /* * We are limited to MAX_LOCKDEP_SUBLCLASSES number of subclasses, so * add this in here and add a static_assert to keep us from going over * the limit. As of this writing we're limited to 8, and we're |