Hi, I just noticed that CPU throttling and Block Migration don't work together very well. During block migration the throttling heuristic detects that we obviously make no progress in ram transfer. But the reason is the running block migration and not a too high dirty pages rate.
The result is that any VM is throttled by 99% during block migration. I wonder what the best way would be fix this. I came up with the following ideas so far: - disable throttling while block migration is in bulk stage - check if absolute number of num_dirty_pages_period crosses a threshold and not if its just greater than 50% of transferred bytes - check if migration_dirty_pages > 0. This slows down throttling, but does not avoid it completely. Peter
