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,