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From: Yosry Ahmed <yosryahmed@google.com>
Date: Wed, 17 Jan 2024 19:51:41 -0800
Message-ID: <CAJD7tkaaPKbCF_0D2vGs3GwE2dHaueNw6z_uv-Gqg-MQneOmqw@mail.gmail.com>
Subject: Re: [PATCH 0/2] mm/zswap: optimize the scalability of zswap rb-tree
To: Chris Li <chrisl@kernel.org>
Cc: Chengming Zhou <zhouchengming@bytedance.com>, Andrew Morton <akpm@linux-foundation.org>, 
	linux-kernel@vger.kernel.org, Johannes Weiner <hannes@cmpxchg.org>, linux-mm@kvack.org, 
	Nhat Pham <nphamcs@gmail.com>
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On Wed, Jan 17, 2024 at 5:03=E2=80=AFPM Chris Li <chrisl@kernel.org> wrote:
>
> Hi Yosry,
>
> On Wed, Jan 17, 2024 at 4:35=E2=80=AFPM Yosry Ahmed <yosryahmed@google.co=
m> wrote:
> > Hmm I don't understand. What's the point of keeping the rbtree if we
> > have the xarray? Doesn't it end up being more expensive and bug-prone
> > to maintain both trees?
>
> Patch 2/2 remove the rb tree code. Just keeping the tree spinlock.
>
> >
> > When you say "eventual goal", do you mean what the patch would morph
> > into in later versions (as in v1 is just a proof of concept without
> > removing the rbtree), or follow up patches?
>
> V1 will remove the rb tree, but does not merge the rb tree lock with
> the xarray lock.

I see you already posted the patches, let's move the discussion there.
I will take a look at them as soon as I get the chance to.