Dear kvm users/developpers,
I have a problem here where the network interface of a guest hang
2 or 3 times a day. No more packets can be sent out or received, no
error in guest or host logs. I have to stop networking, remove module,
then modprobe again and start the network to get back connection.
On Thu, Nov 13, 2008 at 01:04:05PM +, Daniel P. Berrange wrote:
>
> Many of the KVM developers don't use libvirt, so probably best if you
> post the actual KVM command line libvirt spawned - you can get it from
> the logfile in /var/log/libvirt/qemu/$NAME.log, where $NAME is your
> guest's nam
On Thu, Nov 13, 2008 at 03:12:33PM +, Mark McLoughlin wrote:
> The fact that re-loading the virtio_net driver fixes things up makes me
> suspect you've found a bug in the virtio_net driver, rather than e.g. a
> bug in the kvm-userspace side.
>
> To try and narrow down what's happening, when th
On Thu, Nov 13, 2008 at 04:24:52PM +0100, Emmanuel Lacour wrote:
> On Thu, Nov 13, 2008 at 03:12:33PM +, Mark McLoughlin wrote:
> > The fact that re-loading the virtio_net driver fixes things up makes me
> > suspect you've found a bug in the virtio_net driver, rather than e
Dear users/developers,
i have a guest which freeze 2 or 3 times per weeks (nothin in the logs,
blank vnc screen). I'm going to try to fix this by testing upgrade to
more recnt kernel/kvm, but I would like in the meantime to make a script
which restart the guest domain in case it freezes.
Is there
On Tue, Nov 18, 2008 at 09:39:35AM -0700, David Mair wrote:
>>
> If the guest has a reachable IP address the simplest way might be to
> ping the guest from the host every so often and, if it stops responding
> for long enough to make you believe it has frozen, kill the qemu process
> and r
On Fri, Nov 14, 2008 at 06:26:44PM +, Mark McLoughlin wrote:
>
> Right, the tap device tx queue is full because kvm-userspace isn't
> reading packets from it.
>
> This could be because kvm-userspace has just stopped noticing that
> there's data available from the tapfd or because virtio_net i
On Tue, Nov 18, 2008 at 07:37:57PM +0100, Emmanuel Lacour wrote:
>
> I made the test, putting link down then up fix it.
>
> So what can I do next time to help fixing this ?
>
I had the problem one more time, I made an strace of the kvm process
which start with non working networ
On Wed, Nov 19, 2008 at 01:13:52PM +, Mark McLoughlin wrote:
>
> Is it possible for you to try a newer guest kernel?
>
The guest will be rebooted today on 2.7.27.6.
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On Wed, Nov 19, 2008 at 07:03:09PM +, Mark McLoughlin wrote:
>
> I had a look at Emmanuel's strace log and it shows that qemu isn't
> selecting on the tapfd, presumably because virtio_net_can_receive() sees
> that we've exhausted all available receive buffers.
>
> When qemu does poll the tapf
On Thu, Nov 20, 2008 at 12:36:50PM +0100, Emmanuel Lacour wrote:
> The difficulty is that I can not always reproduce the bug.
>
> But another interesting think is that I switched to e1000 and I had
> another lock after that with same symptoms :(
>
> Like answered a few minutes
On Fri, Nov 21, 2008 at 09:38:23AM +0100, Emmanuel Lacour wrote:
>
> I continue to have this problem with this setup:
>
> - host 2.6.27.4, kvm-78, intel, debian etch 64bits
> - guest 2.6.27.6, debian sarge 32 bits, e1000, 2 vcpus
>
> up/down of interface is enough to recove
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