Re: [Xen-devel] [xen-4.0-testing test] 2045: regressions - FAIL

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Ian Campbell writes ("Re: [Xen-devel] [xen-4.0-testing test] 2045: regressions 
- FAIL"):
> On Tue, 2010-08-31 at 15:35 +0100, Ian Jackson wrote:
> > [Ian C:]
> > > did this by adding
> > >         net.ipv4.conf.default.arp_notify = 1
> > > to /etc/sysctl.conf and that seemed to do the trick.
> > 
> > I think this is a bug.  I think the default should be for something to
> > send this gratuitous arp and the most logical answer in the PV or
> > PV-on-HVM case is the domU.
> 
> This is the upstream default, not something we control directly from
> netfront etc.

Um, I'm not sure I follow.  The situation when we need to do
gratuitous arp is after save/restore or migration.  This is somewhat
analogous to hibernation/suspend, except that hibernation/suspend
pretty much assumes that the system was previously not running, not
previously on a different switch port etc.

Perhaps netfront needs to do something special.

Ian.

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