From: Peter Watkins <treestem@gmail.com>
Date: Mon, 7 May 2012 20:11:37 +0000 (-0400)
Subject: xfs: fix memory reclaim deadlock on agi buffer
X-Git-Tag: v3.5-rc1~91^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3ba316037470bbf98c8a16c2179c02794fb8862e;p=pandora-kernel.git

xfs: fix memory reclaim deadlock on agi buffer

Note xfs_iget can be called while holding a locked agi buffer. If
it goes into memory reclaim then inode teardown may try to lock the
same buffer. Prevent the deadlock by calling radix_tree_preload
with GFP_NOFS.

Signed-off-by: Peter Watkins <treestem@gmail.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
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