+ docs-admin-guide-mm-zswap-remove-zsmallocs-lack-of-writeback-warning.patch added to mm-hotfixes-unstable branch

+ docs-admin-guide-mm-zswap-remove-zsmallocs-lack-of-writeback-warning.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

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The patch titled
     Subject: Docs/admin-guide/mm/zswap: remove zsmalloc's lack of writeback warning
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     docs-admin-guide-mm-zswap-remove-zsmallocs-lack-of-writeback-warning.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/docs-admin-guide-mm-zswap-remove-zsmallocs-lack-of-writeback-warning.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Nhat Pham <nphamcs@gmail.com>
Subject: Docs/admin-guide/mm/zswap: remove zsmalloc's lack of writeback warning
Date: Fri, 6 Jan 2023 14:00:16 -0800

Writeback has been implemented for zsmalloc, so this warning no longer
holds.

Link: https://lkml.kernel.org/r/20230106220016.172303-1-nphamcs@gmail.com
Fixes: 9997bc017549a ("zsmalloc: implement writeback mechanism for zsmalloc")
Suggested-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Nhat Pham <nphamcs@gmail.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 Documentation/admin-guide/mm/zswap.rst |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- a/Documentation/admin-guide/mm/zswap.rst~docs-admin-guide-mm-zswap-remove-zsmallocs-lack-of-writeback-warning
+++ a/Documentation/admin-guide/mm/zswap.rst
@@ -70,9 +70,7 @@ e.g. ``zswap.zpool=zbud``. It can also b
 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.
 
 When a swap page is passed from frontswap to zswap, zswap maintains a mapping
 of the swap entry, a combination of the swap type and swap offset, to the zpool
_

Patches currently in -mm which might be from nphamcs@gmail.com are

docs-admin-guide-mm-zswap-remove-zsmallocs-lack-of-writeback-warning.patch

Re: + docs-admin-guide-mm-zswap-remove-zsmallocs-lack-of-writeback-warning.patch added to mm-hotfixes-unstable branch

[Sergey Senozhatsky]

On (23/01/06 15:54), Andrew Morton wrote:
> Writeback has been implemented for zsmalloc, so this warning no longer
> holds.
> 
> Link: https://lkml.kernel.org/r/20230106220016.172303-1-nphamcs@gmail.com
> Fixes: 9997bc017549a ("zsmalloc: implement writeback mechanism for zsmalloc")
> Suggested-by: Thomas Weißschuh <linux@weissschuh.net>
> Signed-off-by: Nhat Pham <nphamcs@gmail.com>
> Cc: Sergey Senozhatsky <senozhatsky@chromium.org>

Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>