Messages in this thread | | | Subject | Re: [RFC] scsi: switch to scsi-mq by default | From | John Garry <> | Date | Wed, 4 Jul 2018 09:18:23 +0100 |
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On 04/07/2018 00:21, Bart Van Assche wrote: > On Tue, 2018-07-03 at 08:54 +0200, Johannes Thumshirn wrote: >> It has been more than one year since we tried to change the default >> from legacy to multi queue in SCSI. Back then we had to retract the >> change because of performance issues with rotating disks. >> >> In the meantime there have been a substantial amount of performance >> improvements, thus we can re-enable scsi-mq without a significant >> performance penalty. > > Hello Johannes, > > Please include references to commits cbe7dfa26eee ("Revert "scsi: > default to scsi-mq"") and 5c279bd9e406 ("scsi: default to scsi-mq"). > I think it's a good idea to mention that suspend/resume now works > with scsi-mq. > > Bart.
We were seeing performance drops previously for hisi_sas when originally enabled by default, but results on 4.18 seem almost identical with and without MQ default.
FWIW,
Acked-by: John Garry <john.garry@huawei.com>
> > > > > > > >
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