Re: xen-netfront: txqueues in a frozen state, no packets in the softqueue

[Andrew Cooper <andrew.cooper3@citrix.com>]

XenServer had an issue which looked a little like this.

The fix was
http://xenbits.xensource.com/hg/xen-unstable.hg/rev/02b92d035f64 , but
if you are using PV guests then this is certainly not the same issue.

~Andrew

On 17/02/12 11:41, Stefano Stabellini wrote:
> Forwarding this email to xen-devel with a proper subject.
>
>
> ---------- Forwarded message ----------
> Stefano,
>
>    after a few days running traffic, we are seeing that one of the
> linux netdevice txqueues has gone into a frozen state and any packet
> that you give from there onwards is always queued to a softqueue and
> is never put into the xen-netfront txqueue...
>
> it also looks like xen-netfront is not registering a timeout callback
> and this may lead to a crash if the callback ever gets invoked.
>
> do you happen to know if this has been seen before and if there was a
> fix for it?
>
> we are currently running with linux-3.0.9.
>
> Thank you!
> -Alessandro-
>
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-- 
Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer
T: +44 (0)1223 225 900, http://www.citrix.com