Re: [Xen-devel] [PATCH] xen/arm: Panic when we receive an unexpected trap

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2014-06-18 at 17:08 +0100, Julien Grall wrote:
> On 06/18/2014 05:02 PM, Ian Campbell wrote:
> > On Tue, 2014-06-17 at 21:44 +0100, Julien Grall wrote:
> >> The current implementation of do_unexpected_trap make Xen spin forever
> >> on the current physical CPU. This may lead to stall guests VCPU and print
> >> unhelpful message (RCU stall...).
> >>
> >> Usually when Xen receives an unexpected trap, it means that something goes
> >> wrong either in the hypervisor or in the CPU. In this case we should
> >> directly panic to also stop the other CPUs.
> >>
> >> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> > 
> > Ack + applied.
> 
> Thanks, I think this patch is a good candidate for backporting on Xen 4.4

Noted.

> 
> It will avoid Xen to try to continue running when an unexpected trap occurs.
> 
> Regards,
> 



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