Re: [PATCH] scsi: switch to scsi-mq by default

[Adrian Hunter]

On 11/07/18 05:52, Martin K. Petersen wrote:
> 
> Johannes,
> 
>> It has been more than one year since we tried to change the default
>> from legacy to multi queue in SCSI with commit c279bd9e406 ("scsi:
>> default to scsi-mq"). But due to issues with suspend/resume and
>> performance problems it had been reverted again with commit
>> cbe7dfa26eee ("Revert "scsi: default to scsi-mq"").
>>
>> In the meantime there have been a substantial amount of performance
>> improvements and suspend/resume got fixed as well, thus we can
>> re-enable scsi-mq without a significant performance penalty.
> 
> Applied to 4.19/scsi-queue, thanks!
> 

But there is no runtime pm support, is there?  I tried enabling runtime PM
for UFS SCSI devices with scsi-mq and it didn't work, which is a regression.