On 8/16/18 10:51 AM, Paolo Valente wrote: > Hi Jens, > > while working a little bit on cgroups I/O control, I found two nasty > bugs in bfq. They break bandwidth control in simple configurations > with one-process groups. These bugs are fixed by the first two patches > in this series. > > These fixes improved I/O control so much, that I could reduce the > write overcharge factor, used by bfq to counter write-induced > issues. This reduction is performed by the third patch. > > The fourth patch contains a little code improvement I made in a > function that has to do with I/O control. > > I hope we are still in time for 4.19. Patches look fine to me. You are in fact several weeks late for 4.19, I need to have anything that's going in to 4.19 by -rc6 or -rc7 time (depending on whether we have an -rc8 or not). This is to ensure that it gets plenty of time in linux-next as well. I've queued up patches this time (since they were small), but please send them in in due time next time. -- Jens Axboe
