From: Jan Kara <jack@suse.cz>
Date: Tue, 24 Aug 2010 12:28:03 +0000 (+0200)
Subject: ocfs2: Fix deadlock when allocating page
X-Git-Tag: v2.6.36-rc4~68^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b4c0ff32ccd87ab52d4c5bd0a0536febce11370;p=pandora-kernel.git

ocfs2: Fix deadlock when allocating page

We cannot call grab_cache_page() when holding filesystem locks or with
a transaction started as grab_cache_page() calls page allocation with
GFP_KERNEL flag and thus page reclaim can recurse back into the filesystem
causing deadlocks or various assertion failures. We have to use
find_or_create_page() instead and pass it GFP_NOFS as we do with other
allocations.

Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
---

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