On Tue, May 2, 2017 at 10:00 AM, Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx> wrote: > On 2017.05.02 at 09:54 +0200, Sedat Dilek wrote: >> Hi, >> >> I want to play with BFQ. >> >> My base is block-next as of 28-Apr-2017. >> >> First I looked through the Kconfigs. >> What is a good setting? >> Built as module? >> >> How can I switch the IO-scheduler - real-time? >> >> Not sure if the attached patches make sense (right now). > > No, it doesn't make sense at all. > BFQ is a mq scheduler. To use it you should enable > SCSI_MQ_DEFAULT. And then you can switch schedulers like: > > echo "kyber" > /sys/block/sda/queue/scheduler > echo "bfq" > /sys/block/sdb/queue/scheduler > Great, I got these informations before starting a kernel-build. So, I have now... $ ./scripts/diffconfig /boot/config-4.11.0-1-iniza-amd64 .config -BLK_DEV_HD n SCSI_MQ_DEFAULT n -> y +BFQ_GROUP_IOSCHED y +BLK_DEV_THROTTLING_LOW n +IOSCHED_BFQ y +MQ_IOSCHED_KYBER y Thanks, Markus. - Sedat -
