linux-kernel - Re: [PATCHv3 6/8] zram: Add recompression algorithm choice to Kconfig

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Message-ID: <Y04YYtJUZPq13fLg@google.com>
Date:   Tue, 18 Oct 2022 12:07:14 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Minchan Kim <minchan@...nel.org>
Cc:     Sergey Senozhatsky <senozhatsky@...omium.org>,
        Nitin Gupta <ngupta@...are.org>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCHv3 6/8] zram: Add recompression algorithm choice to Kconfig

Make (secondary) recompression algorithm selectable just like
we do it for the (primary) default one.

Signed-off-by: Sergey Senozhatsky <senozhatsky@...omium.org>
---
 drivers/block/zram/Kconfig | 40 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig
index 3e00656a6f8a..076a76cd1664 100644
--- a/drivers/block/zram/Kconfig
+++ b/drivers/block/zram/Kconfig
@@ -93,3 +93,43 @@ config ZRAM_MULTI_COMP
 
 	SIZE (in bytes) parameter sets the object size watermark: idle
 	objects that are of a smaller size will not get recompressed.
+
+choice
+	prompt "Default zram recompression algorithm"
+	default ZRAM_DEF_RECOMP_ZSTD
+	depends on ZRAM && ZRAM_MULTI_COMP
+
+config ZRAM_DEF_RECOMP_LZORLE
+	bool "lzo-rle"
+	depends on CRYPTO_LZO
+
+config ZRAM_DEF_RECOMP_ZSTD
+	bool "zstd"
+	depends on CRYPTO_ZSTD
+
+config ZRAM_DEF_RECOMP_LZ4
+	bool "lz4"
+	depends on CRYPTO_LZ4
+
+config ZRAM_DEF_RECOMP_LZO
+	bool "lzo"
+	depends on CRYPTO_LZO
+
+config ZRAM_DEF_RECOMP_LZ4HC
+	bool "lz4hc"
+	depends on CRYPTO_LZ4HC
+
+config ZRAM_DEF_RECOMP_842
+	bool "842"
+	depends on CRYPTO_842
+
+endchoice
+
+config ZRAM_DEF_RECOMP
+	string
+	default "lzo-rle" if ZRAM_DEF_RECOMP_LZORLE
+	default "zstd" if ZRAM_DEF_RECOMP_ZSTD
+	default "lz4" if ZRAM_DEF_RECOMP_LZ4
+	default "lzo" if ZRAM_DEF_RECOMP_LZO
+	default "lz4hc" if ZRAM_DEF_RECOMP_LZ4HC
+	default "842" if ZRAM_DEF_RECOMP_842
-- 
2.38.0.413.g74048e4d9e-goog