From: Shaohua Li <shli@kernel.org>
Date: Fri, 13 Apr 2012 02:27:35 +0000 (+0800)
Subject: jbd2: use GFP_NOFS for blkdev_issue_flush
X-Git-Tag: v3.2.17~145
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f25543699889485de366c0ccf311fc593946c96e;p=pandora-kernel.git

jbd2: use GFP_NOFS for blkdev_issue_flush

commit 99aa78466777083255b876293e9e83dec7cd809a upstream.

flush request is issued in transaction commit code path, so looks using
GFP_KERNEL to allocate memory for flush request bio falls into the classic
deadlock issue.  I saw btrfs and dm get it right, but ext4, xfs and md are
using GFP.

Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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