From: Gregory Haskins <ghaskins@novell.com>
Date: Fri, 25 Jan 2008 20:08:09 +0000 (+0100)
Subject: sched: de-SCHED_OTHER-ize the RT path
X-Git-Tag: v2.6.25-rc1~1237^2~72
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e7693a362ec84bb5b6fd441d8a8b4b9d568a7a0c;p=pandora-kernel.git

sched: de-SCHED_OTHER-ize the RT path

The current wake-up code path tries to determine if it can optimize the
wake-up to "this_cpu" by computing load calculations.  The problem is that
these calculations are only relevant to SCHED_OTHER tasks where load is king.
For RT tasks, priority is king.  So the load calculation is completely wasted
bandwidth.

Therefore, we create a new sched_class interface to help with
pre-wakeup routing decisions and move the load calculation as a function
of CFS task's class.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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