linux-kernel - [PATCHv3 4/4] zsmalloc: set default zspage chain size to 8

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Message-Id: <20230118005210.2814763-5-senozhatsky@chromium.org>
Date:   Wed, 18 Jan 2023 09:52:10 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Minchan Kim <minchan@...nel.org>
Cc:     Mike Kravetz <mike.kravetz@...cle.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: [PATCHv3 4/4] zsmalloc: set default zspage chain size to 8

This changes key characteristics (pages per-zspage and objects
per-zspage) of a number of size classes which in results in
different pool configuration. With zspage chain size of 8 we
have more size clases clusters (123) and higher huge size class
watermark (3632 bytes).

Please read zsmalloc documentation for more details.

Signed-off-by: Sergey Senozhatsky <senozhatsky@...omium.org>
Acked-by: Minchan Kim <minchan@...nel.org>
---
 mm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index 1cfc0ec4e35e..ebfe5796adf8 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -193,7 +193,7 @@ config ZSMALLOC_STAT
 
 config ZSMALLOC_CHAIN_SIZE
 	int "Maximum number of physical pages per-zspage"
-	default 4
+	default 8
 	range 4 16
 	depends on ZSMALLOC
 	help
-- 
2.39.0.314.g84b9a713c41-goog