From 355b659c87432a4e76160640625c47fcf9174e8d Mon Sep 17 00:00:00 2001
From: Corrado Zoccolo <czoccolo@gmail.com>
Date: Thu, 8 Oct 2009 08:43:32 +0200
Subject: [PATCH] cfq-iosched: avoid probable slice overrun when idling

If the average think time is larger than the remaining time slice
for any given queue, don't allow it to idle. A succesful idle also
means that we need to dispatch and complete a request, so if we don't
even have time left for the idle process, we would overrun the slice
in any case.

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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