On Thu, 13 Dec 2018 17:24:21 +0100 Tomasz Torcz <tomek@xxxxxxxxxxxxxx> wrote: > On Wed, Dec 12, 2018 at 04:30:20PM -0700, stan wrote: > > Enabled deadline and cfq again, but still no bfq available. > > $ cat /sys/block/sda/queue/scheduler > > noop deadline [cfq] > > Those are single-queue scheduler. Multiqueue uses different > schedulers: bfq, kyber, mq-deadline. MQ schedulers won't appear on > single-queue devices even if you modprobe such schedulers. > You probably need “scsi_mod.use_blk_mq=y dm_mod.use_blk_mq=y” kernel > commandline options, although I think those are default in recent > kernels. Thanks. I got the impression from the documentation I read that BFQ operated for both mq and single queue. In fact, IIRC it actually degraded mq performance slightly, but enhanced single queue performance. I guess I was wrong. I'll try the above to see if it enables me to use bfq on single queue devices. _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
