> Il giorno 04 set 2017, alle ore 10:14, Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> ha scritto: > > On Thu, Aug 31, 2017 at 03:42:57PM +0100, Mel Gorman wrote: >> On Thu, Aug 31, 2017 at 08:46:28AM +0200, Paolo Valente wrote: >>> [SECOND TAKE, with just the name of one of the tester fixed] >>> >>> Hi, >>> while testing the read-write unfairness issues reported by Mel, I >>> found BFQ failing to guarantee good responsiveness against heavy >>> random sync writes in the background, i.e., multiple writers doing >>> random writes and systematic fdatasync [1]. The failure was caused by >>> three related bugs, because of which BFQ failed to guarantee to >>> high-weight processes the expected fraction of the throughput. >>> >> >> Queued on top of Ming's most recent series even though that's still a work >> in progress. I should know in a few days how things stand. >> > > The problems with parallel heavy writers seem to have disappeared with this > series. There are still revisions taking place on Ming's to overall setting > of legacy vs mq is still a work in progress but this series looks good. > Great news! Thanks for testing, Paolo > Thanks. > > -- > Mel Gorman > SUSE Labs
