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xen-users
Re: [Xen-users] domU loses network after a while
Hello Pasi,
Are you thinking about the smartpoll patch ?
* [x86/xen] Disable netfront's smartpoll mode by default. If so, yes the debian kernel we are using, is fine about this issue.
Regards
Olivier
2010/11/19 Pasi Kärkkäinen <pasik@xxxxxx>
On Thu, Nov 18, 2010 at 10:35:46PM +0100, Erwan RENIER wrote:
> Le 18/11/2010 19:33, Stein van Oevelen a écrit :
>
> Nathan Friess wrote:
>
> Hi,
>
> I have a host running Debian Squeeze with Xen 4.0.1 installed from
> the Debian repository. My host is working fine running 10 domUs,
> except that after some number of days one or more domUs lose their
> network interface. In dom0 and domU I'm running kernel
> 2.6.32-5-xen-amd64 (PV kernel in Debian repo), and interfaces are in
> a bridged config.
>
> In case anyone runs into something similar, I did figure out how to
> resolve my issue without having to reboot the domU... which is a
> slight improvement I suppose.
>
> Running
> xm network-detach domUName 0
>
> Causes eth0 to disappear in the domain, and the following to show up
> in dmesg:
>
> net eth0: xennet_release_rx_bufs: fix me for copying receiver.
>
> Then running an xm network-attach will bring eth0 back and everything
> will be okay.
>
> I also tried rmmoding xen_netfront in domU before I figured out the
> network-detach, but this doesn't help. When modprobing again, the
> domU says "eth0: link is not ready". This also causes any subsequent
> attempt to network-detach in dom0 to get stuck and eventually timeout
> with "Device 0 (vif) could not be disconnected."
>
> Also, when the vif is stuck, the TX dropped packets shown in dom0 is
> steadily increasing. It seems that dom0 is having trouble sending
> packets to domU because one of the two gets stuck in an unexpected
> state. At least doing a network-detach will reset the state and allow
> things to run properly again.
>
> Nathan
>
> _______________________________________________
> Xen-users mailing list
> [1]Xen-users@xxxxxxxxxxxxxxxxxxx
> [2]http://lists.xensource.com/xen-users
>
> I have a similar issue, however my DomU's seem to get their connection
> back after a while automatically, most of the time it happens when I
> physically login to the Dom0 :/
>
>
Are you guys running the latest kernel?
This sounds like a bug that was fixed two months ago (or so)
in the upstream "xen/stable-2.6.32.x" git branch..
-- Pasi
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