Re: [PATCH -next v6 2/2] mm/zswap: delay the initializaton of zswap

[Christoph Hellwig]

On Wed, Mar 22, 2023 at 06:17:12PM +0100, Vitaly Wool wrote:
> On Wed, Mar 22, 2023 at 10:30 AM Liu Shixin <liushixin2@xxxxxxxxxx> wrote:
> >
> > Since some users may not use zswap, the zswap_pool is wasted. Save memory
> > by delaying the initialization of zswap until enabled.
> 
> To be honest, I'm not a huge fan of this. Would enabling zswap module
> build instead solve your problem?

making zswap build modular would be a mess.  It is core MM infrastructure
and now we'd need to start dealing with adding and removing it at
runtime as well as module refcounting.