Re: [RFC PATCH 0/2] mm: zsmalloc: make shrinker compaction budget-aware

[Chris Wiseman]

On Wed, Nov 4, 2026 at 9:05 PM Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> wrote:
>
> On (26/11/05 09:10), Xueyuan Chen wrote:
> [..]
> > > SGTM, but I'll let Sergey chime in!
> >
> > Thanks, Nhat and Chris, for the discussion.
> >
> > If Sergey has no objections, I'd be happy to send a follow-up series
> > to make the shrinker configurable and add the unlocked pre-check as
> > Nhat suggested.
>
> Thanks.  Sounds like you and Chris will to have "Rock-Paper-Scissors"
> to determine who sends a oatch ;)  Just joking, let's first figure
> out how exactly we want that zsmalloc-shrinker thing to behave wrt
> zswap expectations.

Haha, Xueyuan is welcome to send the patches!

Dumb question on the zswap side - aren't the zswap shrinker and the
zsmalloc shrinker independent?  Even if zswap's shrinker is turned off
at runtime, normal swap-ins still free slots and leave fragmentation
behind, and unlike zram, zswap doesn't have a manual sysfs compact knob.
Would it be simpler to just keep CONFIG_ZSMALLOC_SHRINKER as its own
standalone config rather than tying it to zswap's runtime knob?