* [Qemu-devel] virtio-net with vhost RX stall
@ 2013-08-12 11:57 Benoît Canet
2013-08-12 12:10 ` Michael S. Tsirkin
0 siblings, 1 reply; 3+ messages in thread
From: Benoît Canet @ 2013-08-12 11:57 UTC (permalink / raw)
To: qemu-devel; +Cc: mst
Hello,
I am chasing a randomly occuring RX stall with virtio-net and vhost-net.
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] virtio-net with vhost RX stall
2013-08-12 11:57 [Qemu-devel] virtio-net with vhost RX stall Benoît Canet
@ 2013-08-12 12:10 ` Michael S. Tsirkin
2013-08-12 15:45 ` Benoît Canet
0 siblings, 1 reply; 3+ messages in thread
From: Michael S. Tsirkin @ 2013-08-12 12:10 UTC (permalink / raw)
To: Benoît Canet; +Cc: qemu-devel
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] virtio-net with vhost RX stall
2013-08-12 12:10 ` Michael S. Tsirkin
@ 2013-08-12 15:45 ` Benoît Canet
0 siblings, 0 replies; 3+ messages in thread
From: Benoît Canet @ 2013-08-12 15:45 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: Benoît Canet, qemu-devel
> Any chance the bug is fixed by 'virtio_net: fix race in RX VQ processing'?
We will test if we have more luck with a 3.10 and a backport of this patch.
> Dump the ring state and index values where they poll, on host and guest.
ok
Thanks
Benoît
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2013-08-12 15:43 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2013-08-12 11:57 [Qemu-devel] virtio-net with vhost RX stall Benoît Canet
2013-08-12 12:10 ` Michael S. Tsirkin
2013-08-12 15:45 ` Benoît Canet
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