Re: [PATCH] block: Add bvec_folio()

[Christoph Hellwig]

On Mon, May 25, 2026 at 02:29:27PM +0100, Matthew Wilcox wrote:
> > So I'm not against the function per se, but the documentation must
> > explain the minefields it is stepping into a bit better.
> 
> Lower level drivers shouldn't be concerning themselves with folios.
> For a start, we can put non-folios (eg slab memory) into bvecs.

Well, that is a very good thing to put into the comment.  We can also
put them into high-level bvecs, so framing this as 'only use if you
know the memory is folios, which you can't unless you are the entity
who filled the bio' might be a good choice.