Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked

[Wen Congyang]

At 03/12/2012 06:33 PM, Avi Kivity Wrote:
> On 03/12/2012 11:04 AM, Wen Congyang wrote:
>> Do you have any other comments about this patch?
>>
> 
> Not really, but I'm not 100% convinced the patch is worthwhile.  It's
> likely to only be used by Linux, which has kexec facilities, and you can
> put talk to management via virtio-serial and describe the crash in more
> details than a simple hypercall.

Hmm, can we use virtio-serial to talk with not-linux OS? I guess the answer
is no. If so, virtio-serial is also used by linux.

Another problem is: virtio-serial is available on many deployed versions
but the guest must have virtio-serial device. So we cannot know the guest
is panicked if it does not have virtio-serial device while the hypercall does
not depend on any device.

Thanks
Wen Congyang