* Lin Ma (l...@suse.com) wrote: > Hi all, Hi Lin,
> When I live migrate a qemu/kvm guest, If the guest is using huge pages, I > found that > the migrate_set_speed command had no effect during stage 2. Can you explain what you mean by 'stage 2'? > It was caused by commit 4c011c3 postcopy: Send whole huge pages > > I'm wondering that is it by design or is it a bug waiting for fix? This is the first report I've seen for it. How did you conclude that 4c011c3 caused it? While I can see it might have some effect on the bandwidth management, I'm surprised it has this much effect. What size huge pages are you using - 2MB or 1GB? I can imagine we might have a problem that since we only do the sleep between the hugepages, if we were using 1GB hugepages then we'd see <big chunk of data>[sleep]<big chunk of data>[sleep] which isn't as smooth as it used to be. Can you give me some more details of your test? Dave > > Thanks, > Lin -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK