Btrfs: Always use the async submission queue for checksummed writes

This avoids IO stalls and poorly ordered IO from inline writers mixing in
with the async submission queue

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index d8a256d..016c0c0 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -434,13 +434,6 @@ int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
 {
        struct async_submit_bio *async;
 
-       /*
-        * inline writerback should stay inline, only hop to the async
-        * queue if we're pdflush
-        */
-       if (!current_is_pdflush())
-               return submit_bio_hook(inode, rw, bio, mirror_num);
-
        async = kmalloc(sizeof(*async), GFP_NOFS);
        if (!async)
                return -ENOMEM;