OK that worked for an nvme drive, but not for an internal SATA HDD.
$ sudo lsmod | grep bfq
$ sudo cat /sys/block/sda/queue/scheduler
noop deadline [cfq]
$ sudo insmod /usr/lib/modules/4.19.8-300.fc29.x86_64/kernel/block/bfq.ko.xz
$ sudo cat /sys/block/sda/queue/scheduler
noop deadline [cfq]
$ sudo lsmod | grep bfq
bfq 69632 0
$
So yeah this seems a lot more difficult than it should be.
Chris Murphy
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