Re: [Qemu-devel] [PATCH 02/11] Add migrate_set_parameter and query-migrate-parameters

[Luiz Capitulino <lcapitulino@redhat.com>]

On Mon, 30 Jul 2012 15:04:57 -0500
Anthony Liguori <aliguori@us.ibm.com> wrote:

> Luiz Capitulino <lcapitulino@redhat.com> writes:
> 
> > On Mon, 30 Jul 2012 14:45:04 -0500
> > Anthony Liguori <aliguori@us.ibm.com> wrote:
> >
> >> Orit Wasserman <owasserm@redhat.com> writes:
> >> 
> >> > The management can enable/disable a capability for the next migration by using
> >> > migrate_set_parameter command.
> >> > The management can query the current migration capabilities using
> >> > query-migrate-parameters
> >> >
> >> > Signed-off-by: Orit Wasserman <owasserm@redhat.com>
> >> > Signed-off-by: Juan Quintela <quintela@redhat.com>
> >> 
> >> We have a way to add new commands.  Let's not invent a new one.
> >> Otherwise every subsystem would have it's own approach to querying
> >> what's available.
> >
> > I think it does make sense for setting/getting migration's capabilities, which
> > are just booleans. And that's what the commands currently do, btw.
> >
> > I'd only recommend to rename them to migrate_set_capability
> > query-migrate-capabilities.
> 
> If that's the intent, it should take/return a list of capabilities
> (expressed as an enum).

Yes, it already does it iirc.

Now, there's something I'm not sure about. This series adds three commands:

 - migrate-set-parameter (should be renamed to migrate-set-capabilities)
 - query-migrate-parameters (should be renamed to query-migrate-capabilities)
 - query-migration-capabilities (should be dropped?)

That last command returns the supported capabilities. We should either,
rename it to query-migration-supported-capabilities or just drop it, because
if a capability appears in (this series') query-migrate-parameters it
means that the capability is supported.