Re: Which I/O scheduler is Fedora switching to in 4.21? mq-deadline or BFQ?

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Chris Murphy <lists@xxxxxxxxxxxxxxxxx> writes:

> [root@fnuc ~]# cat /sys/block/sda/queue/scheduler
> noop deadline [cfq]
> [root@fnuc ~]# insmod
> /usr/lib/modules/4.19.8-300.fc29.x86_64/kernel/block/bfq.ko.xz
> [root@fnuc ~]# lsmod | grep bfq
> bfq                    69632  0
> [root@fnuc ~]# cat /sys/block/sda/queue/scheduler
> noop deadline [cfq]
> [root@fnuc ~]#
>
> This appears in dmesg at the time I insmod bfq
> [148854.557310] io scheduler bfq registered
>
> And
> [root@fnuc ~]# dmesg | grep sched
> [    3.109164] io scheduler noop registered
> [    3.109174] io scheduler deadline registered
> [    3.109285] io scheduler cfq registered (default)
> [    3.109294] io scheduler mq-deadline registered
> [    3.302592] sched_clock: Marking stable (3301306612,
> 1243588)->(3308582463, -6032263)
> [   11.129620] systemd[1]: systemd-journald.service: Service has no
> hold-off time (RestartSec=0), scheduling restart.
> [148854.557310] io scheduler bfq registered
> [root@fnuc ~]#
>
>
> If you want the entire dmesg I'll send it offlist.

Yes, please.

-Jeff
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