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Date: Wed, 2 Nov 2016 18:23:28 +0100
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: "M. Vefa Bicakci" <m.v.b@runbox.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Charles (Chas) Williams" <ciwillia@brocade.com>
Subject: Re: [PREEMPT-RT] Oops in rapl_cpu_prepare()
Message-ID: <20161102172327.qam4ylpewmwnnmlx@linutronix.de>
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On 2016-11-01 13:15:53 [+0300], M. Vefa Bicakci wrote:
> Hello Sebastian,
Hi,

> The patch fixes the kernel oops for me.
> 
> I am using a custom 4.8.5-based kernel on Qubes OS R3.2, which is based
> on Xen 4.6.3. Apparently, Xen also has a similar bug/flaw/quirk regarding
> the allocation of package identifiers for the virtual CPUs.
> 
> Prior to your patch, my Xen-based virtual machines would intermittently
> crash most of the time at boot-up with the backtrace reported by Charles.
> Due to this, I was under the impression that this is a subtle race
> condition.

how hard is it to get such a xen setup up and running?

Sebastian