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Re: [Xen-devel] Xen 3.2.1 and large traffic problems

  • To: Pepe Barbe <elventear@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Wed, 24 Sep 2008 22:04:55 +0100
  • Cc:
  • Delivery-date: Wed, 24 Sep 2008 14:06:05 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AckeiTGzcBy30Ip8Ed2rTAAWy6hiGQ==
  • Thread-topic: [Xen-devel] Xen 3.2.1 and large traffic problems

Does it take out just the VIF which has the sustained traffic? If so it
would indicate a bug in the netback driver in your dom0 kernel. Actually,
whatever the bug, it is almost certainly in the dom0 kernel rather than in
Xen itself. What dom0 kernel are you using?

 -- Keir

On 24/9/08 21:10, "Pepe Barbe" <elventear@xxxxxxxxx> wrote:

> Hello,
> I am having a issue with my Xen setup, that other people have reported
> as well. No one seems to have a solution to this problem or an idea
> what might cause it. My only hope is that I might get some more ideas
> here in the devel list.
> The basic problem is that if there is sustained high data rate traffic
> through a virtual interface, it seems that the queues fill up and the
> link dies, taking like 2 minutes or so to come back up. Once it dies
> there is nothing to be done except wait for it to start working. In my
> case high data rate means more than 5 Mbps.
> My only solution has been to use iptables QoS to limit traffic to 4
> Mbps. Otherwise during normal usage I hit this issue sporadically
> cutting our off our network completely.
> Below are a few links that refer to this problem, so you can get an
> idea of what people are experiencing and what has been suggested.
> Related Xen-Users posts:
> http://tinyurl.com/4uhbbx
> http://tinyurl.com/4slb72
> http://tinyurl.com/3mfcky
> Related Ubuntu bug:
> http://tinyurl.com/4nex6q
> I would gladly try whatever it is suggested to debug this problem, but
> I need some ideas first, because I don't know what else to try.
> Thank you,
> Pepe
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

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