Re: xennet0: rx no buf

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Nov 30, 2017 at 05:15:07PM +0000, Stephen Borrill wrote:
> On Tue, 21 Feb 2017, Michael van Elst wrote:
> > netbsd%precedence.co.uk@localhost (Stephen Borrill) writes:
> > 
> > > I'm finding that my NetBSD 7 web-server VMs are often dropping off
> > > the network with "xennet0: rx no buf" errors, even under only moderate
> > > load. When this happens, the machines usually end up unresponsive and need
> > > to be hard-rebooted.
> > 
> > The code is pretty naive with buffer allocation.
> 
> That doesn't make it any less annoying. Adding RAM doesn't appear to help.
> 
> Any workarounds or mitigation besides rebooting nightly? Can I pre-emptively
> check for near buffer exhaustion to allow for a reboot or ifconfig down/up?

Ticket #1379 should have helped with this. Does your kernel have this
change ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--