Btrfs: make flushoncommit mount option correctly wait on ordered_extents
The commit_transaction call to wait_ordered_extents when snap_pending
passes nocow_only=1 to process only NOCOW or PREALLOC extents. This isn't
correct for the 'flushoncommit' mode, as it skips extents we just started
IO on in start_delalloc_inodes.
So, in the flushoncommit case, wait on all ordered extents. Otherwise,
only pass the nocow_only flag to wait_ordered_extents if snap_pending.
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 32454d1c..e51d2bc 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -942,9 +942,11 @@
mutex_unlock(&root->fs_info->trans_mutex);
- if (flush_on_commit || snap_pending) {
- if (flush_on_commit)
- btrfs_start_delalloc_inodes(root);
+ if (flush_on_commit) {
+ btrfs_start_delalloc_inodes(root);
+ ret = btrfs_wait_ordered_extents(root, 0);
+ BUG_ON(ret);
+ } else if (snap_pending) {
ret = btrfs_wait_ordered_extents(root, 1);
BUG_ON(ret);
}
