linux-kernel - Re: [PATCH v2] x86 mmiotrace: dynamically disable non-boot CPUs

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Message-ID: <20080426111307.GA401@elte.hu>
Date:	Sat, 26 Apr 2008 13:13:07 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Pekka Paalanen <pq@....fi>
Cc:	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Subject: Re: [PATCH v2] x86 mmiotrace: dynamically disable non-boot CPUs


* Pekka Paalanen <pq@....fi> wrote:

> From 8979ee55cb6a429c4edd72ebec2244b849f6a79a Mon Sep 17 00:00:00 2001
> From: Pekka Paalanen <pq@....fi>
> Date: Sat, 12 Apr 2008 00:18:57 +0300
> Subject: [PATCH] x86 mmiotrace: dynamically disable non-boot CPUs
> 
> Mmiotrace is not reliable with multiple CPUs and may miss events. Drop 
> to single CPU when mmiotrace is activated.
> 
> Signed-off-by: Pekka Paalanen <pq@....fi>
> ---
> 
> I've tested this patch on my Core 2 Duo laptop, and with "[PATCH v2] 
> Check for breakpoint in text_poke to eliminate bug_on" cpu hotplug 
> seems to work fine on a sched-devel/latest SMP kernel both with and 
> without CONFIG_HOTPLUG_CPU.

thanks Pekka, applied.

	Ingo
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