From: Suresh Siddha <suresh.b.siddha@intel.com>
Date: Wed, 5 Sep 2007 12:32:48 +0000 (+0200)
Subject: sched: fix MC/HT scheduler optimization, without breaking the FUZZ logic.
X-Git-Tag: v2.6.23-rc6~15^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7fd0d2dde929ead79901e389e70dbfb3c6c06986;p=pandora-kernel.git

sched: fix MC/HT scheduler optimization, without breaking the FUZZ logic.

First fix the check
	if (*imbalance + SCHED_LOAD_SCALE_FUZZ < busiest_load_per_task)
with this
	if (*imbalance < busiest_load_per_task)

As the current check is always false for nice 0 tasks (as
SCHED_LOAD_SCALE_FUZZ is same as busiest_load_per_task for nice 0
tasks).

With the above change, imbalance was getting reset to 0 in the corner
case condition, making the FUZZ logic fail. Fix it by not corrupting the
imbalance and change the imbalance, only when it finds that the HT/MC
optimization is needed.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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