[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
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: |
Wed, 14 Mar 2012 15:16:05 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120216 Thunderbird/10.0.1 |
On 03/14/2012 03:14 PM, Gleb Natapov wrote:
> On Wed, Mar 14, 2012 at 03:07:46PM +0200, Avi Kivity wrote:
> > On 03/14/2012 01:11 PM, Wen Congyang wrote:
> > > >
> > > > I don't think we want to use the driver. Instead, have a small piece of
> > > > code that resets the device and pushes out a string (the panic message?)
> > > > without any interrupts etc.
> > > >
> > > > It's still going to be less reliable than a hypercall, I agree.
> > >
> > > Do you still want to use complicated and less reliable way?
> >
> > Are you willing to try it out and see how complicated it really is?
> >
> > While it's more complicated, it's also more flexible. You can
> > communicate the panic message, whether the guest is attempting a kdump
> > and its own recovery or whether it wants the host to do it, etc., you
> > can communicate less severe failures like oopses.
> >
> hypercall can take arguments to achieve the same.
It has to be designed in advance; and every time we notice something's
missing we have to update the host kernel.
> > > I think the other ones prefer to touch the hypervisor.
> >
> > I understand the sentiment. Your patches are simple and easy. But my
> > feeling is that the kernel has become too complicated already and I'm
> > looking for ways to limit changes.
> >
> Using virtio-serial will not reduce kernel complexity. Quite contrary
> since code that will use virtio-serial will be more complicated.
The host kernel is unmodified though.
--
error compiling committee.c: too many arguments to function
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, (continued)
- 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
- 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 <=
- 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, Eric Northup, 2012/03/14
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Wen Congyang, 2012/03/15
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Gleb Natapov, 2012/03/15
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Jan Kiszka, 2012/03/15
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Avi Kivity, 2012/03/15
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Wen Congyang, 2012/03/16
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Anthony Liguori, 2012/03/21
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Wen Congyang, 2012/03/22
- Re: [Qemu-devel] [PATCH 0/2 v3] kvm: notify host when guest panicked, Eric Northup, 2012/03/14