Btrfs: make delalloc inodes be flushed by multi-task

This patch introduce a new worker pool named "flush_workers", and if we
want to force all the inode with pending delalloc to the disks, we can
queue those inodes into the work queue of the worker pool, in this way,
those inodes will be flushed by multi-task.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 4e1def4c06b..9c466f9f817 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1497,7 +1497,11 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
                 WARN_ON(cur_trans != trans->transaction);
 
                 if (flush_on_commit || snap_pending) {
-                        btrfs_start_delalloc_inodes(root, 1);
+                        ret = btrfs_start_delalloc_inodes(root, 1);
+                        if (ret) {
+                                btrfs_abort_transaction(trans, root, ret);
+                                goto cleanup_transaction;
+                        }
                         btrfs_wait_ordered_extents(root, 1);
                 }