[PATCH] Btrfs: make sure the delalloc workers actually flush compressed writes

[Josef Bacik <jbacik@fusionio.com>]

When using delalloc workers in a non-waiting way (like for enospc handling) we
can end up not actually waiting for the dirty pages to be started if we have
compression.  We need to add an extra filemap flush to make sure any async
extents that have started are actually moved along before returning.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---
 fs/btrfs/inode.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a239de0..0c7212a 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8181,18 +8181,24 @@ out_notrans:
 static void btrfs_run_delalloc_work(struct btrfs_work *work)
 {
 	struct btrfs_delalloc_work *delalloc_work;
+	struct inode *inode;
 
 	delalloc_work = container_of(work, struct btrfs_delalloc_work,
 				     work);
-	if (delalloc_work->wait)
-		btrfs_wait_ordered_range(delalloc_work->inode, 0, (u64)-1);
-	else
-		filemap_flush(delalloc_work->inode->i_mapping);
+	inode = delalloc_work->inode;
+	if (delalloc_work->wait) {
+		btrfs_wait_ordered_range(inode, 0, (u64)-1);
+	} else {
+		filemap_flush(inode->i_mapping);
+		if (test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT,
+			     &BTRFS_I(inode)->runtime_flags))
+			filemap_flush(inode->i_mapping);
+	}
 
 	if (delalloc_work->delay_iput)
-		btrfs_add_delayed_iput(delalloc_work->inode);
+		btrfs_add_delayed_iput(inode);
 	else
-		iput(delalloc_work->inode);
+		iput(inode);
 	complete(&delalloc_work->completion);
 }
 
-- 
1.8.3.1