linux-kernel - Re: [PATCH] x86: Don't send RESCHEDULE

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Message-ID: <20080311092148.GM25110@elte.hu>
Date:	Tue, 11 Mar 2008 10:21:48 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	gregory.haskins@...il.com
Cc:	ego@...ibm.com, Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
Subject: Re: [PATCH] x86: Don't send RESCHEDULE_VECTOR to offlined cpus


* Gregory Haskins <gregory.haskins.ml@...il.com> wrote:

>> Yup, this afternoon while running cpu-hotplug stress tests 
>> (http://lkml.org/lkml/2008/3/3/11) in parallel with kern-bench, I got 
>> this on the serial console.
>
> Note that this may be a side-effect of the bug we are chasing with the 
> rd->online problem.
>
> E.g. if the rd->online issue is causing us to route tasks to dead 
> CPUs, this phenomenon would probably go away once rd->online is fixed 
> (which I believe it is with the patches that were submitted).

yeah, that makes sense. I've applied your patch nevertheless because it 
is the better failure mode for that code.

	Ingo
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