From: Vivek Goyal <vgoyal@redhat.com>
Date: Thu, 3 Dec 2009 17:59:51 +0000 (-0500)
Subject: blkio: Drop the reference to queue once the task changes cgroup
X-Git-Tag: v2.6.33-rc1~379^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=24610333d578478d354144ab4709a203684afc5f;p=pandora-kernel.git

blkio: Drop the reference to queue once the task changes cgroup

o If a task changes cgroup, drop reference to the cfqq associated with io
  context and set cfqq pointer stored in ioc to NULL so that upon next request
  arrival we will allocate a  new queue in new group.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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