From: Shaohua Li <shli@kernel.org>
Date: Tue, 24 Apr 2012 13:23:46 +0000 (+0800)
Subject: xfs: using GFP_NOFS for blkdev_issue_flush
X-Git-Tag: firefly_0821_release~3680^2~2769^2~47
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7582df516c93046b8d2111a780c69de77f9882fb;p=firefly-linux-kernel-4.4.55.git

xfs: using GFP_NOFS for blkdev_issue_flush

Issuing a block device flush request in transaction context using GFP_KERNEL
directly can cause deadlocks due to memory reclaim recursion. Use GFP_NOFS to
avoid recursion from reclaim context.

Signed-off-by: Shaohua Li <shli@fusionio.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
---

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index b5aafc395ea1..28d1f508b578 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -622,7 +622,7 @@ void
 xfs_blkdev_issue_flush(
 	xfs_buftarg_t		*buftarg)
 {
-	blkdev_issue_flush(buftarg->bt_bdev, GFP_KERNEL, NULL);
+	blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
 }
 
 STATIC void