On 10/07/2015 12:20 AM, Denis V. Lunev wrote: > From: Igor Redko <red...@virtuozzo.com> > > This patch declares a new migration capability that allows > to distinguish between true migration and the test. > > An alternative is using a custom URI but in this case the > following problems should be solved: > 1/ QEMUFile abstraction hides the real transport type > 2/ We must be ensured that VM will not be stopped due to > “successful migration” > > Possible solutions: > 1/ Using global variable analogous to > s->enabled_capabilities[MIGRATION_CAPABILITY_TEST_ONLY] that > will be initialized according to the migration type at the > beginning of the migration process > 2/ Additional hook, presence of implementation of which allows > to decide whether the migration is true >
Do we want to name the capability 'x-test-only', since this series is experimental, to make it obvious that production code should not rely on it? > +++ b/qapi-schema.json > @@ -540,11 +540,14 @@ > # @auto-converge: If enabled, QEMU will automatically throttle down the guest > # to speed up convergence of RAM migration. (since 1.6) > # > +# @test-only: If enabled, QEMU instead of migrating will estimate migration > +# time basing on given downtime and current dirty page rate If we do decide to add this to mainline, it would need 'since 2.5' (or whatever version) documentation. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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