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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>
This commit is contained in:
Sage Weil 2009-07-24 13:17:44 -04:00 committed by Chris Mason
parent d717aa1d31
commit ebecd3d9d2
1 changed files with 5 additions and 3 deletions
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8
fs/btrfs/transaction.c
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@ -942,9 +942,11 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
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);
}