Re: [PATCH v2 0/2] zswap pool per-CPU acomp_ctx simplifications

Yosry Ahmed
2026-03-17T19:48:17Z

On Tue, Mar 17, 2026 at 12:45 PM Andrew Morton
<akpm@linux-foundation.org> wrote:
>
> On Mon, 16 Mar 2026 18:48:00 -0700 "Kanchana P. Sridhar" <kanchanapsridhar2026@gmail.com> wrote:
>
> > This patchset first removes redundant checks on the acomp_ctx and its
> > "req" member in zswap_cpu_comp_dead().
> >
> > Next, it persists the zswap pool's per-CPU acomp_ctx resources to
> > last until the pool is destroyed. It then simplifies the per-CPU
> > acomp_ctx mutex locking in zswap_compress()/zswap_decompress().
> >
> > Code comments added after allocation and before checking to deallocate
> > the per-CPU acomp_ctx's members, based on expected crypto API return
> > values and zswap changes this patchset makes.
> >
> > Patch 2 is an independent submission of patch 23 from [1], to
> > facilitate merging.
>
> Thanks.
>
> What happened with "mm: zswap: Consistently use IS_ERR_OR_NULL() to
> check acomp_ctx resources"? Still relevant?
>
> https://lkml.kernel.org/r/20260314051632.17931-3-kanchanapsridhar2026@gmail.com

We decided to drop it (and patch 1 here kinda sorta takes its place):