Re: [Qemu-devel] [PATCH v7 17/42] Add migration-capability boolean for postcopy-ram.

[Dr. David Alan Gilbert]

* Eric Blake (address@hidden) wrote:
> On 06/16/2015 04:26 AM, Dr. David Alan Gilbert (git) wrote:
> > From: "Dr. David Alan Gilbert" <address@hidden>
> > 
> > The 'postcopy ram' capability allows postcopy migration of RAM;
> > note that the migration starts off in precopy mode until
> > postcopy mode is triggered (see the migrate_start_postcopy
> > patch later in the series).
> > 
> > Signed-off-by: Dr. David Alan Gilbert <address@hidden>
> > ---
> >  include/migration/migration.h |  1 +
> >  migration/migration.c         | 23 +++++++++++++++++++++++
> >  qapi-schema.json              |  6 +++++-
> >  3 files changed, 29 insertions(+), 1 deletion(-)
> > 
> 
> > +++ b/qapi-schema.json
> > @@ -526,11 +526,15 @@
> >  # @auto-converge: If enabled, QEMU will automatically throttle down the 
> > guest
> >  #          to speed up convergence of RAM migration. (since 1.6)
> >  #
> > +# @x-postcopy-ram: Start executing on the migration target before all of 
> > RAM has
> > +#          been migrated, pulling the remaining pages along as needed. 
> > NOTE: If
> > +#          the migration fails during postcopy the VM will fail.  (since 
> > 2.4)
> 
> Marking it experimental because it might change?  Or is the interface
> pretty stable, but you want more testing time to minimize bugs?

It's easy enough to remove the x-  once we're all happy;  it seems pretty
stable at the moment but when we're done I'll just submit a one liner to take 
the x-
off.

Dave

> Reviewed-by: Eric Blake <address@hidden>
> 
> -- 
> Eric Blake   eblake redhat com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
> 


--
Dr. David Alan Gilbert / address@hidden / Manchester, UK