From: Chris Mason <chris.mason@oracle.com>
Date: Wed, 16 Apr 2008 17:06:16 +0000 (-0400)
Subject: Btrfs: Only do async bio submission for pdflush
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7b859fe7cd383fa5e7e379884a748680d0af7bcc;p=linux-beck.git

Btrfs: Only do async bio submission for pdflush

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

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 9e41ea93ebce..76ee7a4ae00c 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -381,6 +381,13 @@ 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;