On Thu, Nov 26, 2020 at 06:17:34PM +0300, Andrey Gruzdev wrote: > Since reading UFFD events and saving paged data are performed > from the same thread, write fault latencies are sensitive to > migration stream stalls. Limiting total page saving rate is a > method to reduce amount of noticiable fault resolution latencies. > > Migration bandwidth limiting is achieved via noticing cases of > out-of-threshold write fault latencies and temporarily disabling > (strictly speaking, severely throttling) saving non-faulting pages.
So have you done any measurements out of it, as we've talked in previous version? Thanks, -- Peter Xu
