set the i/o scheduler

[seanorama]

https://access.redhat.com/solutions/54164

[seanorama]

Could use grubby. But it will be missed during a kernel upgrade.
KERNEL in /boot/vmlinuz-*; do sudo grubby --update-kernel="$KERNEL" --args='transparent_hugepage=never elevator=noop'; done

So likely have to make a script like for thp that loops through the devices at every boot.