Re: [PATCH v5 1/3] blk-mq: introduce blk_mq_set_request_complete

Jens Axboe
2021-02-04T15:42:25Z

On 2/4/21 8:36 AM, Christoph Hellwig wrote:
> On Thu, Feb 04, 2021 at 08:32:17AM -0700, Jens Axboe wrote:
>> On 2/4/21 8:30 AM, Christoph Hellwig wrote:
>>> On Thu, Feb 04, 2021 at 08:27:46AM -0700, Jens Axboe wrote:
>>>> On 1/31/21 8:49 PM, Chao Leng wrote:
>>>>> nvme drivers need to set the state of request to MQ_RQ_COMPLETE when
>>>>> directly complete request in queue_rq.
>>>>> So add blk_mq_set_request_complete.
>>>>
>>>> This is a bit iffy, but looks ok for the intended use case. We just have
>>>> to be careful NOT to add frivolous users of it...
>>>
>>> Yes, that is my main issue with it. The current use case looks fine,
>>> but I suspect every time someone else uses it it's probly going to be
>>> as misuse. I've applied this to nvme-5.12 with the rest of the patches,
>>> it should be on its way to you soon.
>>
>> Might benefit from a big fat comment on why you probably shouldn't
>> be using it...
>
> I actually reworded the comment a bit, this is the current version:
>
> http://git.infradead.org/nvme.git/commitdiff/bdd2a4a61460a341c1f8462e5caf63195e960623

Alright looks fine, as it clearly states it should be used from
->queue_rq().

--
Jens Axboe