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

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 28/11/14 15:19, Anthony Wright wrote:
> We have a 64 bit PV DomU that we recently upgraded from linux 3.3.2 to
> 3.17.3 running on a 64 bit 3.17.3 Dom0 with Xen 4.4.0.
> 
> Shortly after the upgrade we started to lose network connectivity to the
> DomU a few times a day that required a reboot to fix. We see nothing in
> the xen logs or xl dmesg, but when we looked at the dmesg output we saw
> the following output for the two incidents we investigated in detail:
> 
> [69332.026586] vif vif-4-0 vif4.0: txreq.offset: 85e, size: 4002, end: 6144
> [69332.026607] vif vif-4-0 vif4.0: fatal error; disabling device
> [69332.031069] br-default: port 2(vif4.0) entered disabled state

The guest's frontend driver isn't putting valid requests onto the ring
(it crosses a page boundary) so this is a frontend bug.

What guest are you running?

David

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