From: Steven Whitehouse <swhiteho@redhat.com>
Date: Wed, 30 Mar 2011 15:25:51 +0000 (+0100)
Subject: GFS2: Use filemap_fdatawrite() to write back the AIL
X-Git-Tag: v3.0-rc1~384^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5ac048bb7ea6e87b06504b999017cfa1f38f4092;p=pandora-kernel.git

GFS2: Use filemap_fdatawrite() to write back the AIL

In order to ensure that the mapping stats (and thus the bdi) are correctly
updated, this patch changes the AIL writeback to use the filemap_datawrite
function. This helps prevent stalls in balance_dirty_pages() due to
large amounts of dirty metadata when there is little or no dirty data
around.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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