linux-kernel - Re: [PATCH v3] mm: zswap: multiple zpools support

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Message-ID: <CAJD7tkbfKxCOoxNCgtbaAg4LXFbf=afaxei0SbKU2B=HFpPf6Q@mail.gmail.com>
Date:   Fri, 11 Aug 2023 16:20:57 -0700
From:   Yosry Ahmed <yosryahmed@...gle.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Nhat Pham <nphamcs@...il.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Seth Jennings <sjenning@...hat.com>,
        Dan Streetman <ddstreet@...e.org>,
        Vitaly Wool <vitaly.wool@...sulko.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Domenico Cerasuolo <cerasuolodomenico@...il.com>,
        Yu Zhao <yuzhao@...gle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] mm: zswap: multiple zpools support

On Fri, Aug 11, 2023 at 2:19 PM Andrew Morton <akpm@...ux-foundation.org> wrote:
>
> On Thu, 13 Jul 2023 03:35:25 -0700 Yosry Ahmed <yosryahmed@...gle.com> wrote:
>
> > >
> > > I'm experimenting with some other zswap changes - if I have
> > > extra cycles and resources I'll try to apply this patch and see how the
> > > numbers play out.
> >
> > That would be amazing. Looking forward to any numbers you can dig :)
>
> So this patch seems stuck.  I can keep it in mm.git until the fog
> clears, but would prefer not to.  Can we please revisit and decide on a
> way forward?

Johannes did not like a config option so I proposed it here as a
constant (like SWAP_CLUSTER_MAX and others we have). This is a value
that we have been using in our data centers for almost a decade, so it
has seen a ton of testing. I was hoping Johannes would get time to
take a look, or Nhat would get time to test it out, but neither of
these things happen.

I obviously want it to be merged, but hopefully someone will chime in here :)