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

[Gleb Natapov]

On Tue, Mar 20, 2012 at 05:59:16PM +0800, Wen Congyang wrote:
> At 03/19/2012 03:33 PM, Wen Congyang Wrote:
> > At 03/08/2012 03:57 PM, Wen Congyang Wrote:
> >> We can know the guest is paniced when the guest runs on xen.
> >> But we do not have such feature on kvm.
> >>
> >> Another purpose of this feature is: management app(for example:
> >> libvirt) can do auto dump when the guest is crashed. If management
> >> app does not do auto dump, the guest's user can do dump by hand if
> >> he sees the guest is paniced.
> >>
> >> I touch the hypervisor instead of using virtio-serial, because
> >> 1. it is simple
> >> 2. the virtio-serial is an optional device, and the guest may
> >>    not have such device.
> >>
> >> Changes from v2 to v3:
> >> 1. correct spelling
> >>
> >> Changes from v1 to v2:
> >> 1. split up host and guest-side changes
> >> 2. introduce new request flag to avoid changing return values.
> >> --
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> >>
> > 
> > 
> > Hi all:
> > 
> > we neet this feature, but we don't decide how to implement it.
> > We have two solution:
> > 1. use vmcall
> > 2. use virtio-serial.
> > 
> > I will not change this patch set before we decide how to do it.
> > Can we make a decision recent days?
> 
> Anybody can decide which solution to use?
> 
To make an informed decision we need to have at least raw idea how
virtio-serial variant will look.

--
                        Gleb.