Re: [Xen-users] VM bridge doesn't pass traffic

[David Winterstein <dw@xxxxxxxxxxxxxx>]

Am 18.01.2016 um 13:49 schrieb Ian Campbell:
>>> Lastly while I'm fishing for potential clues please could you post the
>>> output of of "xl -vvv create <cfg>", the -vvv makes it much more
>>> verbose.
>> Output of the create command: http://pastebin.com/7CqdS2Zd
>> Output of the vm boot process (from xl console):
>> http://pastebin.com/ZduwSmNn
> Ah, here is something interesting:
>
> [    1.507834] xen_netfront: Initialising Xen virtual ethernet driver
> [    1.513754] xen_netfront: can't alloc rx grant refs
> [    1.513762] net eth0: only created 32 queues
>
> If you use fewer vcpus (like 2 for example) does it work? If so then a
> workaround would be to limit the number of queues to fewer than the number
> of vcpus (the default). IIRC there were some bugs in this capability, I'm
> hoping that Wei (cc-d) can remember the necessary dance.
>
> An alternative to limiting the queues might be to increase the maximum
> number of pages each guest can use for grant tables (i.e. increase the
> number of grants). This can be done with the gnttab_max_nr_frames
> hypervisor command line option. (See http://xenbits.xen.org/docs/4.4/misc/x
> en-command-line.html).
>
> I think the default is 32, so you could e.g. try doubling it.

Hell yes! It worked! Thank you so much!
Wish you all the best and have a nice week.
Regards,
  David

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