linux-kernel - Re: [PATCH] Docs/admin-guide/mm/zswap: remove zsmalloc's lack of writeback warning

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Message-ID: <87mt6ovf5t.fsf@meer.lwn.net>
Date:   Wed, 11 Jan 2023 16:13:02 -0700
From:   Jonathan Corbet <corbet@....net>
To:     Nhat Pham <nphamcs@...il.com>
Cc:     hannes@...xchg.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        kernel-team@...a.com, akpm@...ux-foundation.org
Subject: Re: [PATCH] Docs/admin-guide/mm/zswap: remove zsmalloc's lack of
 writeback warning

Nhat Pham <nphamcs@...il.com> writes:

> Writeback has been implemented for zsmalloc, so this warning no longer
> holds.
>
> Suggested-by: Thomas Weißschuh <linux@...ssschuh.net>
> Signed-off-by: Nhat Pham <nphamcs@...il.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=zbud``. 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 fills it
> -cannot evict the oldest page, it can only reject new pages.
> +storage method, and it can achieve greater storage densities.
>  

Applied, thanks.

jon