[LSF/MM TOPIC][LSF/MM ATTEND] blk-mq and I/O scheduling

[Andreas Herrmann <aherrmann@suse.com>]

Hi,

I'd like to participate in LSF/MM and would like to present/discuss
ideas for introducing I/O scheduling support to blk-mq.

Motiviation for this is to be able use scsi-mq even on systems that
have slow (spinning) devices attached to the SCSI stack.

I think the presentation/discussion should consist of the following

(1) short overview how blk-mq currently performs with spinning devices
    (in comparison to CFQ)

(2) information about my attempt to introduce per sw queue time-slice
    to blk-mq to mitigate the performance degradation with spinning
    devices (in comparison to CFQ)

(3) hopefully I can share information about working code for another
    approach to introduce I/O scheduling for blk-mq (which I am
    currently looking into)

(4) other ideas (e.g. toggle blk-mq per host and/or why we won't look
    into it)


Thanks,

Andreas