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@xxxxxxxxx>
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@xxxxxxxxx
Fixes: 9997bc017549a ("zsmalloc: implement writeback mechanism for zsmalloc")
Suggested-by: Thomas WeiÃ?schuh <linux@xxxxxxxxxxxxxx>
Signed-off-by: Nhat Pham <nphamcs@xxxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxx are
docs-admin-guide-mm-zswap-remove-zsmallocs-lack-of-writeback-warning.patch
