Hi Daniel and Jiri, On 2020/12/8 18:31, Jiri Denemark wrote: > On Tue, Dec 08, 2020 at 09:27:39 +0000, Daniel P. Berrangé wrote: >> On Tue, Dec 08, 2020 at 10:06:25AM +0800, zhukeqian wrote: >>> >>> On 2020/12/7 18:38, Daniel P. Berrangé wrote: >>>> On Mon, Dec 07, 2020 at 09:55:53AM +0800, zhukeqian wrote: >>>>> Hi Daniel, [...] >>> >>> Hi Daniel, >>> >>> The purpose is to remove this failure check for QEMU v2.12. >>> In QEMU commit 65ace0604551, it decoupled the RAM status from the active migration status. >>> >>> The usage scenario is querying migration status at destination side, which may contain >>> active migration status, but without RAM status, so we will see that libvirt report error here. >> >> I'm confused, because AFAIK, libvirt does not need to run >> query-migrate on the destination, so there shouldn't be anything >> that needs fixing. > > Moreover, you can't even request migration statistics on the destination > manually because libvirt blocks that: > > # virsh domjobinfo nest > error: Operation not supported: migration statistics are available only > on the source host > > Jirka > > . > Sorry for delay reply. The purpose of QEMU commit 65ace0604551 (migration: add postcopy total blocktime into query-migrate) is to query some postcopy related information on destination side. We can call query-migrate on destination side *after* migration complete, thanks. Keqian.
