From: Steven Whitehouse <swhiteho@redhat.com>
Date: Mon, 18 Apr 2011 13:18:09 +0000 (+0100)
Subject: GFS2: Make writeback more responsive to system conditions
X-Git-Tag: v3.0-rc1~384^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4667a0ec32867865fd4deccf834594b3ea831baf;p=pandora-kernel.git

GFS2: Make writeback more responsive to system conditions

This patch adds writeback_control to writing back the AIL
list. This means that we can then take advantage of the
information we get in ->write_inode() in order to set off
some pre-emptive writeback.

In addition, the AIL code is cleaned up a bit to make it
a bit simpler to understand.

There is still more which can usefully be done in this area,
but this is a good start at least.

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