Re: [Xen-devel] Network drop to domU (netfront: rx->offset: 0, size: 4294967295)

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 20/05/2009 05:55, "Mickael Marchand" <mikmak@xxxxxxxxxxx> wrote:

>> The issue is that dom0 is trying to copy data to a domU-provided buffer, but
>> the buffer details appear bogus. Netback returns a -1 error to netfront,
>> which then prints out its error message. It's not immediately obvious
>> whether the bug is in netfront or netback. If it's an issue that crops up
>> with many guests then I suppose it's more likely a netback issue, which is a
>> pain. Do domUs lose their connection at the same time, or is it random
>> individual domUs losing their connection from time to time?
> 
> for the record I have the same error messages in domU when migrating
> (live) domUs between 2 servers, it does not always occurs but sometimes.
> I have much much less domUs on the same kind of servers (10-15 domUs)

The error message is quite non specific. The messages you see are quite
probably benign, whereas seeing this message when in 'steady state' is most
definitely a bug.

 -- Keir



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