linux-kernel - Re: v2.6.21.4-rt11

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Message-ID: <20070619090430.GA7471@elte.hu>
Date:	Tue, 19 Jun 2007 11:04:30 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Dinakar Guniguntala <dino@...ibm.com>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	suresh.b.siddha@...el.com, pwil3058@...pond.net.au,
	clameter@....com, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: v2.6.21.4-rt11


* Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com> wrote:

> I believe the patch below is correct. With the patch applied, I could 
> not recreate the imbalance with rcutorture. Let me know whether you 
> still see the problem with this patch applied on any other machine.

thanks for tracking this down! I've applied Christoph's patch (with your 
suggested modification plus a few small cleanups).

I'm wondering, why did this trigger under CFS and not on mainline? 
Mainline seems to have a similar problem in idle_balance() too, or am i 
misreading it?

	Ingo
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