Re: [PATCH RFC v2 3/7] block: export some API

[Christoph Hellwig]

On Tue, Jun 18, 2024 at 03:58:54PM +0800, Yu Kuai wrote:
> There is already bigger helper blkg_conf_prep() exported, as used by bfq
> for a long time already, and this helper is introduced for code
> optimization, as iocost configuration doesn't need to access the blkg.
> 
> Perhaps this should be another discussion about "design mistakes",
> however, I'm not sure why. :( Do you have previous discussions?

blkg_conf_prep at least has some level of abstraction.

But at least my conclusion is:  don't make blk-iocost modular.  It's
far too messy to split out, and not really worth it.