From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xen.org>
Subject: Re: Xen4.2 S3 regression?
Date: Tue, 25 Sep 2012 16:52:46 +0100
Message-ID: <CC8791DE.4CDAF%keir@xen.org>
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To: Ben Guthro <ben@guthro.net>, Jan Beulich <JBeulich@suse.com>
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On 25/09/2012 16:45, "Ben Guthro" <ben@guthro.net> wrote:

> Which is one of the reasons I brought it up again.
> =A0
>> =

>> However, I don't see yet how this is connected to you having
>> a problem only with pinned vCPU-s.
> =

> Well - when the command line parameter dom0_vcpu_pin exists -=A0
> it crashes without this change. It does not crash with it, or without=A0
> the command line parameter.
> =

> Perhaps they are unrelated.

Of course they're related. Dom0 kernel is fixing itself up after S3, while
hypervisor is still bringing CPUs back online. It's a race for one of dom0
kernel's running VCPUs to do a hypercall that observes that one of its other
VCPUs is unschedulable (because there are no currently-online CPUs in its
cpu affinity mask!).

 -- Keir