linux-kernel - Re: [PATCH 2/3] mm: remove unused zpool layer

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Message-Id: <20250829190728.60675-1-sj@kernel.org>
Date: Fri, 29 Aug 2025 12:07:28 -0700
From: SeongJae Park <sj@...nel.org>
To: Johannes Weiner <hannes@...xchg.org>
Cc: SeongJae Park <sj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Yosry Ahmed <yosryahmed@...gle.com>,
	Nhat Pham <nphamcs@...il.com>,
	Chengming Zhou <zhouchengming@...edance.com>,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] mm: remove unused zpool layer

On Fri, 29 Aug 2025 17:15:27 +0100 Johannes Weiner <hannes@...xchg.org> wrote:

> With zswap using zsmalloc directly, there are no more in-tree users of
> this code. Remove it.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>
[...]
> --- a/Documentation/admin-guide/mm/zswap.rst
> +++ b/Documentation/admin-guide/mm/zswap.rst
[...]
>  When a swap page is passed from swapout to zswap, zswap maintains a mapping
> -of the swap entry, a combination of the swap type and swap offset, to the zpool
> -handle that references that compressed swap page.  This mapping is achieved
> -with a red-black tree per swap type.  The swap offset is the search key for the
> -tree nodes.

Nit.  s/red-black tree/xarray/ ?

Other than that,

Acked-by: SeongJae Park <sj@...nel.org>


Thanks,
SJ

[...]