Re: [PATCH 4/5] block: move queue enter logic into blk_mq_submit_bio()

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On 11/4/21 12:39 PM, Christoph Hellwig wrote:
> On Thu, Nov 04, 2021 at 12:37:25PM -0600, Jens Axboe wrote:
>> On 11/4/21 12:36 PM, Christoph Hellwig wrote:
>>>> +static inline bool blk_mq_queue_enter(struct request_queue *q, struct bio *bio)
>>>> +{
>>>> +	if (!blk_try_enter_queue(q, false) && bio_queue_enter(bio))
>>>> +		return false;
>>>> +	return true;
>>>> +}
>>>
>>> Didn't we just agree on splitting bio_queue_enter into an inline helper
>>> and an out of line slowpath instead?
>>
>> See cover letter, and I also added to the commit message of this one. I do
>> think this approach is better, as bio_queue_enter() itself is just slow
>> path and there's no point polluting the code with 90% of what's in there.
>>
>> Hence I kept it as-is.
> 
> Well, let me reword this then:  why do you think the above is
> blk-mq secific and should not be used by every other caller of
> bio_queue_enter as well?  In other words, why not rename
> bio_queue_enter __bio_queue_enter and make the above the public
> bio_queue_enter interface then?

OK, that I can agree too. I'll respin it as such. Gets the job done as
well.

-- 
Jens Axboe




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