Re: [PATCH v11] kvm: notify host when the guest is panicked

2012-11-21 Thread Gleb Natapov
On Tue, Nov 20, 2012 at 07:33:49PM -0200, Marcelo Tosatti wrote: > On Tue, Nov 20, 2012 at 06:09:48PM +0800, Hu Tao wrote: > > Hi Marcelo, > > > > On Tue, Nov 13, 2012 at 12:19:08AM -0200, Marcelo Tosatti wrote: > > > On Fri, Nov 09, 2012 at 03:17:39PM -0500, Sasha Levin wrote: > > > > On Mon, Nov

Re: [PATCH v11] kvm: notify host when the guest is panicked

2012-11-20 Thread Marcelo Tosatti
On Tue, Nov 20, 2012 at 06:09:48PM +0800, Hu Tao wrote: > Hi Marcelo, > > On Tue, Nov 13, 2012 at 12:19:08AM -0200, Marcelo Tosatti wrote: > > On Fri, Nov 09, 2012 at 03:17:39PM -0500, Sasha Levin wrote: > > > On Mon, Nov 5, 2012 at 8:58 PM, Hu Tao wrote: > > > > But in the case of panic notifica

Re: [PATCH v11] kvm: notify host when the guest is panicked

2012-11-20 Thread Hu Tao
Hi Marcelo, On Tue, Nov 13, 2012 at 12:19:08AM -0200, Marcelo Tosatti wrote: > On Fri, Nov 09, 2012 at 03:17:39PM -0500, Sasha Levin wrote: > > On Mon, Nov 5, 2012 at 8:58 PM, Hu Tao wrote: > > > But in the case of panic notification, more dependency means more > > > chances of failure of panic n

Re: [PATCH v11] kvm: notify host when the guest is panicked

2012-11-12 Thread Marcelo Tosatti
On Fri, Nov 09, 2012 at 03:17:39PM -0500, Sasha Levin wrote: > On Mon, Nov 5, 2012 at 8:58 PM, Hu Tao wrote: > > But in the case of panic notification, more dependency means more > > chances of failure of panic notification. Say, if we use a virtio device > > to do panic notification, then we will

Re: [PATCH v11] kvm: notify host when the guest is panicked

2012-11-09 Thread Sasha Levin
On Mon, Nov 5, 2012 at 8:58 PM, Hu Tao wrote: > But in the case of panic notification, more dependency means more > chances of failure of panic notification. Say, if we use a virtio device > to do panic notification, then we will fail if: virtio itself has > problems, virtio for some reason can't

Re: [PATCH v11] kvm: notify host when the guest is panicked

2012-11-05 Thread Hu Tao
On Tue, Oct 30, 2012 at 10:30:02PM -0400, Sasha Levin wrote: > On Tue, Oct 30, 2012 at 9:48 PM, Wen Congyang wrote: > > At 10/31/2012 09:12 AM, Marcelo Tosatti Wrote: > >> It has been asked earlier why a simple virtio device is not usable > >> for this (with no response IIRC). > > > > 1. We can't

Re: [PATCH v11] kvm: notify host when the guest is panicked

2012-10-31 Thread Marcelo Tosatti
On Tue, Oct 30, 2012 at 10:30:02PM -0400, Sasha Levin wrote: > On Tue, Oct 30, 2012 at 9:48 PM, Wen Congyang wrote: > > At 10/31/2012 09:12 AM, Marcelo Tosatti Wrote: > >> It has been asked earlier why a simple virtio device is not usable > >> for this (with no response IIRC). > > > > 1. We can't

Re: [PATCH v11] kvm: notify host when the guest is panicked

2012-10-30 Thread Sasha Levin
On Tue, Oct 30, 2012 at 9:48 PM, Wen Congyang wrote: > At 10/31/2012 09:12 AM, Marcelo Tosatti Wrote: >> It has been asked earlier why a simple virtio device is not usable >> for this (with no response IIRC). > > 1. We can't use virtio device when the kernel is booting. So the issue here is the s

Re: [PATCH v11] kvm: notify host when the guest is panicked

2012-10-30 Thread Wen Congyang
At 10/31/2012 09:12 AM, Marcelo Tosatti Wrote: > On Thu, Oct 25, 2012 at 11:42:32AM +0800, Hu Tao wrote: >> We can know the guest is panicked 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

Re: [PATCH v11] kvm: notify host when the guest is panicked

2012-10-30 Thread Marcelo Tosatti
On Thu, Oct 25, 2012 at 11:42:32AM +0800, Hu Tao wrote: > We can know the guest is panicked 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 panicked. If managemen