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Date: Sat, 28 Apr 2007 18:15:16 +0530
From: Srivatsa Vaddagiri <vatsa@in.ibm.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       Con Kolivas <kernel@kolivas.org>, Nick Piggin <npiggin@suse.de>,
       Mike Galbraith <efault@gmx.de>, Arjan van de Ven <arjan@infradead.org>,
       Peter Williams <pwil3058@bigpond.net.au>,
       Thomas Gleixner <tglx@linutronix.de>, caglar@pardus.org.tr,
       Willy Tarreau <w@1wt.eu>, Gene Heskett <gene.heskett@gmail.com>,
       Mark Lord <lkml@rtr.ca>, Zach Carter <linux@zachcarter.com>,
       buddabrod <buddabrod@gmail.com>
Subject: Re: [patch] CFS scheduler, -v6
Message-ID: <20070428124516.GA27292@in.ibm.com>
Reply-To: vatsa@in.ibm.com
References: <20070425214704.GA32572@elte.hu>
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On Wed, Apr 25, 2007 at 11:47:04PM +0200, Ingo Molnar wrote:
> The CFS patch against v2.6.21-rc7 or against v2.6.20.7 can be downloaded 
> from the usual place:
> 
>     http://redhat.com/~mingo/cfs-scheduler/

+static inline struct rb_node * first_fair(struct rq *rq)
+{
+	if (rq->rb_leftmost)
+		return rq->rb_leftmost;
+	return rb_first(&rq->tasks_timeline);
+}

Won't it help if you update rq->rb_leftmost above from the value
returned by rb_first(), so that subsequent calls to first_fair will be
sped up?

-- 
Regards,
vatsa