Re: [Qemu-devel] [PATCH] kvm: notify host when guest paniced

[Avi Kivity]

On 02/29/2012 11:55 AM, Gleb Natapov wrote:
> > >
> > 
> > How about using a virtio-serial channel for this?  You can transfer any
> > amount of information (including the dump itself).
> > 
> Isn't it unreliable after the guest panicked? 

So is calling hypercalls, or dumping, or writing to the screen.  Of
course calling a hypercall is simpler and so is more reliable.

> Having special kdump
> kernel that transfers dump to a host via virtio-serial channel though
> sounds interesting. May be that's what you mean.

Yes.  The "panic, starting dump" signal should be initiated by the
panicking kernel though, in case the dump fails.

-- 
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