From: Julien Grall <julien.grall@linaro.org>
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
Date: Mon, 15 Jul 2013 17:22:00 +0100 [thread overview]
Message-ID: <51E421A8.1010302@linaro.org> (raw)
In-Reply-To: <20130715152532.GC5774@phenom.dumpdata.com>
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
next prev parent reply other threads:[~2013-07-15 16:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-15 14:21 [PATCH] xen/arm: disable cpuidle when linux is running as dom0 Julien Grall
2013-07-15 15:25 ` [Xen-devel] " Konrad Rzeszutek Wilk
2013-07-15 16:22 ` Julien Grall [this message]
2013-07-17 13:28 ` Stefano Stabellini
2013-07-18 17:20 ` Julien Grall
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