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Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked
From: |
Avi Kivity |
Subject: |
Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked |
Date: |
Tue, 13 Mar 2012 12:47:27 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120216 Thunderbird/10.0.1 |
On 03/13/2012 11:18 AM, Daniel P. Berrange wrote:
> On Mon, Mar 12, 2012 at 12:33:33PM +0200, 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.
>
> As mentioned before, I don't think virtio-serial is a good fit for this.
> We want something that is simple & guaranteed always available. Using
> virtio-serial requires significant setup work on both the host and guest.
So what? It needs to be done anyway for the guest agent.
> Many management application won't know to make a vioserial device available
> to all guests they create.
Then they won't know to deal with the panic event either.
> Most administrators won't even configure kexec,
> let alone virtio serial on top of it.
It should be done by the OS vendor, not the individual admin.
> The hypercall requires zero host
> side config, and zero guest side config, which IMHO is what we need for
> this feature.
If it was this one feature, yes. But we keep getting more and more
features like that and we bloat the hypervisor. There's a reason we
have a host-to-guest channel, we should use it.
--
error compiling committee.c: too many arguments to function
Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Avi Kivity, 2012/03/08
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Wen Congyang, 2012/03/08
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Daniel P. Berrange, 2012/03/13
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked,
Avi Kivity <=
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Wen Congyang, 2012/03/14
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Avi Kivity, 2012/03/14
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Wen Congyang, 2012/03/14
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Avi Kivity, 2012/03/14
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Wen Congyang, 2012/03/14
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Avi Kivity, 2012/03/14
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Gleb Natapov, 2012/03/14
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Avi Kivity, 2012/03/14
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Wen Congyang, 2012/03/14
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Avi Kivity, 2012/03/14