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RE: [Xen-devel] Bug in Linux dom0 netback?

  • To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Joakim Dahlstedt" <jda@xxxxxxx>
  • Date: Tue, 5 Feb 2008 10:20:57 -0000
  • Cc: Jan Beulich <jbeulich@xxxxxxxxxx>
  • Delivery-date: Tue, 05 Feb 2008 02:22:26 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Achn3MtTOyJvbQxKRv2tKmJV3hAL1AAAZb+2AAAeKMA=
  • Thread-topic: [Xen-devel] Bug in Linux dom0 netback?

> Yes, that's a bug. It would only trigger with old domUs which have a
>netfront driver that does not have the new 'copying receiver' support.
>was introduced by c/s 393 a couple of weeks ago.

That reminds me of another question - Maybe I have missed the discussion
on this e-mail list, but in the netback code I have found the following

         * We don't support rx-flip path (except old guests who don't
         * grok this feature flag).

I am a little bit confused by that comment - I think it means we would
prefer not to use rx-flip but we have to anyhow for guests that don't
understand the rx-flip-feature. Is that correct? Or does it mean
something else?
Is there some sort of plan to long-term completely remove rx-flip from
netback then?

/Joakim Dahlstedt

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