From: Mike Snitzer <snitzer@redhat.com>
Date: Tue, 3 Aug 2010 10:54:51 +0000 (+0200)
Subject: block: disallow FS recursion from sb_issue_discard allocation
X-Git-Tag: v2.6.36-rc1~288^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=edca4a380584a65a16839bdee33ec82244f0f88e;p=pandora-kernel.git

block: disallow FS recursion from sb_issue_discard allocation

Filesystems can call sb_issue_discard on a memory reclaim path
(e.g. ext4 calls sb_issue_discard during journal commit).

Use GFP_NOFS in sb_issue_discard to avoid recursing back into the FS.

Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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