Re: [Qemu-devel] [PATCH 1/9] net: Introduce announce timer

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Eric Blake (eblake@redhat.com) wrote:
> On 1/28/19 11:03 AM, Dr. David Alan Gilbert (git) wrote:
> > From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> > 
> > The 'announce timer' will be used by migration, and explicit
> > requests for qemu to perform network announces.
> > 
> > Based on the work by Germano Veit Michel <germano@redhat.com>
> >  and Vlad Yasevich <vyasevic@redhat.com>
> > 
> > Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> > ---
> 
> > +++ b/qapi/net.json
> > @@ -684,3 +684,26 @@
> >  ##
> >  { 'event': 'NIC_RX_FILTER_CHANGED',
> >    'data': { '*name': 'str', 'path': 'str' } }
> > +
> > +##
> > +# @AnnounceParameters:
> > +#
> > +# Parameters for self-announce timers
> > +#
> > +# @initial: Initial delay (in ms) before sending the first GARP/RARP
> > +#       announcement
> > +#
> > +# @max: Maximum delay (in ms) to between GARP/RARP announcement packets
> 
> "to between" should be either "to use in between" or merely "between"

I've changed it to the plain 'between'.

> > +#
> > +# @rounds: Number of self-announcement attempts
> > +#
> > +# @step: Delay increase (in ms) after each self-announcement attempt
> > +#
> > +# Since: 4.0
> > +##
> > +
> > +{ 'struct': 'AnnounceParameters',
> > +  'data': { 'initial': 'int',
> > +            'max': 'int',
> > +            'rounds': 'int',
> > +            'step': 'int' } }
> > 
> 
> Can/should any of the parameters be optional with a sane (documented)
> default?

I think last time Dan was arguing for it to be explicit, the only
default we could pick are the values we currently use, which I think are
only defendable as 'seem to have worked well so far'.

Dave

> -- 
> Eric Blake, Principal Software Engineer
> Red Hat, Inc.           +1-919-301-3226
> Virtualization:  qemu.org | libvirt.org
> 



--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK