From: Jens Axboe <jens.axboe@oracle.com>
Date: Tue, 6 Oct 2009 18:53:44 +0000 (+0200)
Subject: cfq-iosched: fix the slice residual sign
X-Git-Tag: v2.6.32-rc5~26^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9c8946b192397394a0ccd4fcecb31bc060f79f8;p=pandora-kernel.git

cfq-iosched: fix the slice residual sign

We should subtract the slice residual from the rb tree key, since
a negative residual count indicates that the cfqq overran its slice
the last time. Hence we want to add the overrun time, to position
it a bit further away in the service tree.

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