Re: [PATCH] block: save page offset gaps in cloned bio

On Wed, Aug 19, 2026 at 08:04:43AM -0600, Keith Busch wrote:
> > > The split remainder meanwhile can reset its gaps to 0
> > > since it advanced beyond it and will start accounting from there.
> > 
> > I don't really understand this part, though.  As in I don't even
> > understand what you mean here..
> 
> The accounting for the vector gaps happens at the same time we consider
> a bio for splitting. When we do split, the gap value applies only to the
> front bio because that's as far as been processed. The remaining split
> bio should reset its gap value to 0, and it will be recalculated when it
> continues through the split consideration.

Ḣ. but bio_split is used for a lot of different thing.  Then again the
bi_bvec_gap_bit is only used by the low-level blk-mq code, so it might
not matter.  But this for sure warrants a big fat comment explaining
the rationale for the clearing.