Re: [PATCH v2 3/4] scsi: ufs: Enable the BLK_MQ_F_BLOCKING flag

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On 26/05/23 20:27, Bart Van Assche wrote:
> On 5/26/23 00:11, Adrian Hunter wrote:
>> Why would we want to when we don't have to?
> 
> Anyone is allowed to formulate objections to a patch but when objecting to a patch or an approach please explain *why*. I think I already explained that unconditionally enabling BLK_MQ_F_BLOCKING makes testing the UFS host controller driver easier.

I don't think you are claiming blocking queues are better for block drivers than non-blocking queues, so it is quite reasonable to stay with non-blocking queues.

I am not sure testing is really relevant to this discussion, but it seems like different combinations need to be tested anyway e.g. testing with / without clock gating is the same testing with / without blocking.

> 
>> So with those fixed and the vops->may_block instead of vops->nonblocking:
> 
> [ ... ]
> 
> I think a much simpler solution exists. I plan to post a new version of this patch series soon.

Thank you!




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