linux-kernel - Re: v2.6.21.4-rt11

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Message-ID: <20070611073634.GB32446@elte.hu>
Date:	Mon, 11 Jun 2007 09:36:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Dinakar Guniguntala <dino@...ibm.com>
Subject: Re: v2.6.21.4-rt11


* Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:

> 2.6.21.4-rt12 boots on 4-CPU Opteron and passes several hours of 
> rcutorture.  However, if I simply do "modprobe rcutorture", the kernel 
> threads do not spread across the CPUs as I would expect them to, even 
> given CFS.  Instead, the readers all stack up on a single CPU, and I 
> have to use the "taskset" command to spread them out manually.  Is 
> there some config parameter I am missing out on?

hm, what affinity do they start out with? Could they all be pinned to 
CPU#0 by default?

	Ingo
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