linux-kernel - Re: [patch] CFS scheduler, -v6

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Date:	Thu, 26 Apr 2007 21:27:26 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Con Kolivas <kernel@...ivas.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Peter Williams <pwil3058@...pond.net.au>, caglar@...dus.org.tr,
	Willy Tarreau <w@....eu>,
	Gene Heskett <gene.heskett@...il.com>, Mark Lord <lkml@....ca>,
	Zach Carter <linux@...hcarter.com>,
	buddabrod <buddabrod@...il.com>
Subject: Re: [patch] CFS scheduler, -v6

On Wed, 2007-04-25 at 23:47 +0200, Ingo Molnar wrote:
> i got lots of -v5 feedback (thanks and please keep the reports coming!) 

You asked for it :)

CFS breaks the PI support for futexes. Fix below.

	tglx

Index: linux-2.6/kernel/sched.c
===================================================================
--- linux-2.6.orig/kernel/sched.c
+++ linux-2.6/kernel/sched.c
@@ -3234,6 +3234,12 @@ void rt_mutex_setprio(struct task_struct
 	on_rq = p->on_rq;
 	if (on_rq)
 		dequeue_task(rq, p, 0);
+
+	if (rt_prio(prio))
+		p->sched_class = &rt_sched_class;
+	else
+		p->sched_class = &fair_sched_class;
+
 	p->prio = prio;
 
 	if (on_rq) {


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