Re: [PATCH V6 15/30] block: introduce bio_clone_chunk_bioset()

[Christoph Hellwig]

On Thu, Jun 14, 2018 at 10:01:38AM +0800, Ming Lei wrote:
> Bounce limits the max pages as 256 will do bio splitting, so won't need
> this change.

Behavior for the bounce code does not change with my patch.

The important points are:

 - the default interface (bio_clone_bioset in this case) should always
   operate on full biosets
 - if the bounce code needs bioves limited to single pages it should
   be treated as the special case
 - given that the bounce code is inside the block layer using the
   __-prefixed internal interface is perfectly fine
 - last but not least I think the parameter switching the behavior
   needs a much more descriptive name as suggested in my patch