Re: [PATCH v3 21/49] blk-merge: compute bio->bi_seg_front_size efficiently

[Christoph Hellwig]

On Tue, Aug 08, 2017 at 04:45:20PM +0800, Ming Lei wrote:
> It is enough to check and compute bio->bi_seg_front_size just
> after the 1st segment is found, but current code checks that
> for each bvec, which is inefficient.
> 
> This patch follows the way in  __blk_recalc_rq_segments()
> for computing bio->bi_seg_front_size, and it is more efficient
> and code becomes more readable too.

As far as I can tell this doesn't depend on anything else in the
series and could be sent standalone?