From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Fri, 9 Nov 2007 21:39:39 +0000 (+0100)
Subject: sched: avoid large irq-latencies in smp-balancing
X-Git-Tag: v2.6.24-rc3~170^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b82d9fdd848abfbe7263a4ecd9bbb55e575100a6;p=pandora-kernel.git

sched: avoid large irq-latencies in smp-balancing

SMP balancing is done with IRQs disabled and can iterate the full rq.
When rqs are large this can cause large irq-latencies. Limit the nr of
iterations on each run.

This fixes a scheduling latency regression reported by the -rt folks.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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