Re: [Xen-devel] PV DomU running linux 3.17.3 causing xen-netback fatal error in Dom0

[Anthony Wright <anthony@xxxxxxxxxxxxxxx>]

----- Original Message -----
> On 01/12/14 14:22, David Vrabel wrote:
> > On 28/11/14 15:19, Anthony Wright wrote:
> > The guest's frontend driver isn't putting valid requests onto the
> > ring
> > (it crosses a page boundary) so this is a frontend bug.
> 
> This VIF protocol is weird. The first slot contains a txreq with a
> size
> for the total length of the packet, subsequent slots have sizes for
> that
> fragment only.
> 
> netback then has to calculate how long the first slot is, by
> subtracting
> all the size from the following slots.
> 
> So something has gone wrong but it's not obvious what it is. Any
> chance
> you can dump the ring state when it happens?
Really sorry, but how do I dump the ring state? I can a root shell on both the 
Dom0 & DomU, but I don't know the command to use to dump the ring state.

Anthony.

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