From e4ea0c16a85d221ebcc3a21f32e321440459e0fc Mon Sep 17 00:00:00 2001
From: Shaohua Li writes <shaohua.li@intel.com>
Date: Mon, 13 Dec 2010 14:32:22 +0100
Subject: [PATCH] block cfq: select new workload if priority changed

If priority is changed, continuing to check workload_expires and service tree
count of the previous workload does not make sense. We should always choose
the workload with lowest key of new priority in such case.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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