Re: [PATCH V10 01/19] block: introduce multi-page page bvec helpers

Jens Axboe
2018-11-19T03:10:21Z

On 11/18/18 7:23 PM, Ming Lei wrote:
> On Fri, Nov 16, 2018 at 02:13:05PM +0100, Christoph Hellwig wrote:
>>> -#define bvec_iter_page(bvec, iter) \
>>> +#define mp_bvec_iter_page(bvec, iter) \
>>> (__bvec_iter_bvec((bvec), (iter))->bv_page)
>>>
>>> -#define bvec_iter_len(bvec, iter) \
>>> +#define mp_bvec_iter_len(bvec, iter) \
>>
>> I'd much prefer if we would stick to the segment naming that
>> we also use in the higher level helper.
>>
>> So segment_iter_page, segment_iter_len, etc.
>
> We discussed the naming problem before, one big problem is that the 'segment'
> in bio_for_each_segment*() means one single page segment actually.
>
> If we use segment_iter_page() here for multi-page segment, it may
> confuse people.
>
> Of course, I prefer to the naming of segment/page,
>
> And Jens didn't agree to rename bio_for_each_segment*() before.

I didn't like frivolous renaming (and I still don't), but mp_
is horrible imho. Don't name these after the fact that they
are done in conjunction with supporting multipage bvecs. That
very fact will be irrelevant very soon

--
Jens Axboe