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

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 04/12/14 15:36, Anthony Wright wrote:
>> On 01/12/14 14:22, David Vrabel wrote:
>> 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?
> 
> We think we've worked out how to dump the ring state, please see below.

We need the full contents of the ring which isn't currently available
via debugfs and I haven't had time to put together a debug patch to make
it available.

David



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