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From:   Jonathan Corbet <corbet@lwn.net>
To:     Nhat Pham <nphamcs@gmail.com>
Cc:     hannes@cmpxchg.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
        kernel-team@meta.com, akpm@linux-foundation.org
Subject: Re: [PATCH] Docs/admin-guide/mm/zswap: remove zsmalloc's lack of
 writeback warning
In-Reply-To: <20230106220016.172303-1-nphamcs@gmail.com>
References: <20230106220016.172303-1-nphamcs@gmail.com>
Date:   Wed, 11 Jan 2023 16:13:02 -0700
Message-ID: <87mt6ovf5t.fsf@meer.lwn.net>
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Nhat Pham <nphamcs@gmail.com> writes:

> Writeback has been implemented for zsmalloc, so this warning no longer
> holds.
>
> Suggested-by: Thomas Wei=C3=9Fschuh <linux@weissschuh.net>
> Signed-off-by: Nhat Pham <nphamcs@gmail.com>
> ---
>  Documentation/admin-guide/mm/zswap.rst | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/Documentation/admin-guide/mm/zswap.rst b/Documentation/admin=
-guide/mm/zswap.rst
> index f67de481c7f6..6dd74a18268b 100644
> --- a/Documentation/admin-guide/mm/zswap.rst
> +++ b/Documentation/admin-guide/mm/zswap.rst
> @@ -70,9 +70,7 @@ e.g. ``zswap.zpool=3Dzbud``. It can also be changed at =
runtime using the sysfs
>  The zbud type zpool allocates exactly 1 page to store 2 compressed pages=
, which
>  means the compression ratio will always be 2:1 or worse (because of half=
-full
>  zbud pages).  The zsmalloc type zpool has a more complex compressed page
> -storage method, and it can achieve greater storage densities.  However,
> -zsmalloc does not implement compressed page eviction, so once zswap fill=
s it
> -cannot evict the oldest page, it can only reject new pages.
> +storage method, and it can achieve greater storage densities.
>=20=20

Applied, thanks.

jon