On Wednesday, February 5, 2020 5:37 PM, David Hildenbrand wrote: > > > > Not sure how TCG tracks the dirty bits. But In whatever > > implementation, the hypervisor should have > > There is only a single bitmap for that purpose. (well, the one where KVM > syncs to) > > > already dealt with the race between he current round and the previous > round dirty recording. > > (the race isn't brought by this feature essentially) > > It is guaranteed to work reliably without this feature as you only clear what > *has been migrated*, Not "clear what has been migrated" (that skips nothing..) Anyway, it's a hint used for optimization. Best, Wei
