Решил проверить, не знаю зачем, и получил
$ cat /sys/block/sd*/queue/scheduler
none
none
none
none
none$ dmesg | grep -i sched
[ 0.213915] io scheduler noop registered
[ 0.213929] io scheduler bfq registered (default)
[ 0.213930] BFQ I/O-scheduler version: v7r6
[ 0.658499] BFS CPU scheduler v0.456 by Con Kolivas.
$ zcat /proc/config.gz | grep -i bfq
CONFIG_IOSCHED_BFQ=y
CONFIG_CGROUP_BFQIO=y
CONFIG_DEFAULT_BFQ=y
CONFIG_DEFAULT_IOSCHED="bfq"# echo bfq > /sys/block/sda/queue/scheduler && cat /sys/block/sda/queue/scheduler
noneP.S.
$ zcat /proc/config.gz | grep -i blk_mq
CONFIG_CMDLINE="root=/dev/sdd1 rw rootfstype=ext4 scsi_mod.use_blk_mq=Y"
