Message-ID: <51E421A8.1010302@linaro.org>
Date: Mon, 15 Jul 2013 17:22:00 +0100
From: Julien Grall <julien.grall@linaro.org>
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To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: stefano.stabellini@eu.citrix.com, ian.campbell@citrix.com,
        patches@linaro.org, linux-kernel@vger.kernel.org,
        xen-devel@lists.xen.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [Xen-devel] [PATCH] xen/arm: disable cpuidle when linux is running
 as dom0
References: <1373898101-15633-1-git-send-email-julien.grall@linaro.org> <20130715152532.GC5774@phenom.dumpdata.com>
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On 07/15/2013 04:25 PM, Konrad Rzeszutek Wilk wrote:
> On Mon, Jul 15, 2013 at 03:21:41PM +0100, Julien Grall wrote:
>> When linux is running as dom0, Xen doesn't show the physical cpu but a
>> virtual CPU.
>> On some ARM SOC (for instance the exynos 5250), linux registers callbacks
>> for cpuidle. When these callbacks are called, they will modify
>> directly the physical cpu not the virtual one. It can impact the whole board
>> instead of dom0.
> 
> Should you also call disable_cpufreq() ?

I had some issue on the versatile express when cpufreq was disabled.
I will give another try and see the exact error.

-- 
Julien

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