Re: [Qemu-devel] virtio-net with vhost RX stall

[Michael S. Tsirkin]

On Mon, Aug 12, 2013 at 01:57:40PM +0200, Benoît Canet wrote:
> 
> Hello,
> 
> I am chasing a randomly occuring RX stall with virtio-net and vhost-net.

Any chance the bug is fixed by 'virtio_net: fix race in RX VQ processing'?

> 
> So far we have a test setup with a kgdb to debug the guest and a regular gdb
> to debug QEMU.
> We are still trying to reproduce the bug in a test environment.
> 
> Once the bug reproduced would you have hints on what to look for in virtio-net
> driver state ?
> Any idea to debug this would be wellcome.
> 
> Best regards
> 
> Benoît

Dump the ring state and index values where they poll, on host and guest.

-- 
MST