btrfs_orphan_reserve_metadata() will grab metadata reservation from
transaction handle, and the transaction handle was passed from
btrfs_delete_unused_bgs() when delete unused block group.
Repace btrfs_join_transaction() with btrfs_start_transaction() in
btrfs_delete_unused_bgs() to prevent BUG_ON() in btrfs_orphan_add()
Signed-off-by: Forrest Liu <forre...@synology.com>
---
fs/btrfs/extent-tree.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 53294da..61a3255 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -9548,7 +9548,8 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info)
* Want to do this before we do anything else so we can recover
* properly if we fail to join the transaction.
*/
- trans = btrfs_join_transaction(root);
+ /* 1 for btrfs_orphan_reserve_metadata() */
+ trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
btrfs_set_block_group_rw(root, block_group);
ret = PTR_ERR(trans);
--
1.9.1
--
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