Re: [Qemu-devel] pvpanic plans?

[Eric Blake <eblake@redhat.com>]

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On 10/31/2013 08:30 AM, Michael S. Tsirkin wrote:
> On Thu, Oct 24, 2013 at 10:39:03AM +0800, Hu Tao wrote:
>> Hi All,
>>
>> I know it's been a long time since this thread. But qemu 1.7 is
>> releasing, do you have any consensus on this?
>>
>> Thanks.
> 
> 
> I think the biggest issue is the new PANICKED state.
> Guests already have simple ways to halt the CPU,
> and actually do.  I think a new state was a mistake.
> So how about the following? Does it break anything?
> (Untested).
> 
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> 
> diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
> index 226e298..2055afc 100644
> --- a/hw/misc/pvpanic.c
> +++ b/hw/misc/pvpanic.c
> @@ -51,7 +51,6 @@ static void handle_event(int event)
>  
>      if (event & PVPANIC_PANICKED) {
>          panicked_mon_event("pause");
> -        vm_stop(RUN_STATE_GUEST_PANICKED);

Don't you still need to halt the guest on a panic event, for management
to have a chance to choose what to do about the panic?  I'm suspecting
this patch does break things.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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