Re: [Qemu-devel] [PATCH] Move migrate_set_speed and migrate_set_downtime into migrate_set_parameter

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

* Ashijeet Acharya (ashijeetacharya@gmail.com) wrote:
> On Mon, Sep 5, 2016 at 1:46 PM, Paolo Bonzini <pbonzini@redhat.com> wrote:
> >
> >
> > On 05/09/2016 10:11, Ashijeet Acharya wrote:
> >> > > Include migrate_set_speed and migrate_set_downtime inside
> >> > > migrate_set_parameters respectively for setting maximum migration
> >> > > speed and expected downtime parameters. Also add the query part for
> >> > > both in qmp and hmp qemu control interfaces.
> >> > >
> >> > > Signed-off-by: Ashijeet Acharya <ashijeetacharya@gmail.com>
> >> >
> >> > You cannot break backwards compatibility for everyone that is using
> >> > those commands, sorry.
> >>
> >> So should I keep the old commands too and add the new ones anyway for
> >> the query part?
> >
> > You do not need query for the old ones, but you can indeed add support
> > for speed and downtime in migrate-set-parameters and MigrationParameters.
> 
> Right. So I will add the old-commands back and just add support for the new ones
> under migration-set-parameters along with the query.

Yes add them to both migrate_set_parameters and query_migrate_parameters
and the hmp equivalents; but don't remove the old functions; just make
them simple wrappers to call the migrate_set_parameters etc.
Add a comment on them like 'kept for compatibility'.

Dave

> > (Note: I'm not a migration maintainer, so they might say something else).
> 
> Okay. I will wait for their views too.
> 
> Ashijeet
> >
> > Paolo
> >
> >> The old ones will also be modified for query. So we will have
> >> compatibility as well as the
> >> query.
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK