Re: [RFC PATCH v1 0/3] iomap: convert to in-iter ->iomap_next() model

[Christoph Hellwig <hch@lst.de>]

On Fri, Jun 26, 2026 at 10:22:17AM +0800, Gao Xiang wrote:
> It's just my rough thought, as I said in the previous year, I
> still don't have a strong tendency but it's my suggestion over
> these years.
>
> Anyway since you're actively working/changing on iomap, so
> it's fine to just respect your ideas/efforts if you don't
> think it's worth, but as a record of my thoughts here again.

This does sound like a lot of work, and I'm not a 100% sold on
the benefits, although getting rid of callbacks would be nice.

I'd be tempted to say that as a first step we should move the the
single callback, as a second stop (after converting everyone to
the single callback) to inline for performance critical path, and
then see if we can massage it into a pure iterator without much
downside instead of trying to do everything at once.

As you seem to have the strongest opinion here, I'd love to see
a proof of concept from you to get everyone excited.