From nobody Wed Dec 17 12:26:03 2025 Received: from mail-pf1-f170.google.com (mail-pf1-f170.google.com [209.85.210.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E34F187FE6 for ; Mon, 2 Sep 2024 10:57:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.170 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725274637; cv=none; b=THtHLiEvjvT9jRcm+jgM9/rA+hSHcg66BoI9PS1xiYT5xbANevP3TFkvJ/RlWSpi0+McbwkIQ2FUGjid0OwDwxgU0EIRHpxpkC8stSMT05W5do8C4EotB/HxHJIzAAnbaU7lKQ/lPmFKqOa353VmlpKpYNitnAM7TLPOKBmxi0s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725274637; c=relaxed/simple; bh=HVKbbsUahhVeMekRHiUNv/o7+sqVz5XWRuKPpJIOVUo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bdwu0Qe+7qhvYmosAYc/5G9PsIMb/D42JXFk/ccm/StwzGeKSYt3stfPbHvDpCtLoYjRIOnF+HP9yBdSxVMSFm16P3Ky/99vL+V9q++tXFB8XqopnVg/u41Sfwgqhuud+3L2pBUtOUvv0tPG18FS1gtvG59/ZWCt52Y8pcD6KXU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=RMg4LjPl; arc=none smtp.client-ip=209.85.210.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="RMg4LjPl" Received: by mail-pf1-f170.google.com with SMTP id d2e1a72fcca58-7176645e440so108260b3a.1 for ; Mon, 02 Sep 2024 03:57:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1725274636; x=1725879436; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=umU5t5tUEGsQb+BawdLT2hqRrjwi3DIEVB/XFUHlN1U=; b=RMg4LjPl4rCdObJ0gVNvcpXXwRyN0VDEWqnSX8bv0QxOYTlbGdLSfYxunbeATArJSs 6seOP9VN/hVdEDxxynH7qcirOzrGsbFuQiJA9PbLoxdRMfI8N46fNfkocUz8QhfggsPy ET4F38Qa1PuZWYRt6Y3iJ+fYFhccV2FmVWFj4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725274636; x=1725879436; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=umU5t5tUEGsQb+BawdLT2hqRrjwi3DIEVB/XFUHlN1U=; b=PA34XTXfauTjBaUWK/0/78XdAQoSm/YmFbD2SpRKucBocuX2PZzmzGzUO2x/WPAnSA YZxWPYb4IMJNZbrvr8Fz7t04X64kFDiZ7yBfQsJcBQnDLW29YkRAx54JvpIMalilmG6k Rk76gHXU4glq+B2g54b8xp2/Y5nq6OOwIBbl5MXKoaQKRx0ITyA9bOngtMvgtPLstyyg 33ANVnWuylcmW1kjcyyItaqEKyVDtlnyaZQT6+piLJ3+los8YrahsoDOHMs7P2oDvE/L iLRZG/uXyey6Ue2kCyfsJCVoxhIOmSbm4+TBkuYU1tflb2B3b3wmUrJ/K5IYZ/j+b5Sv +AJw== X-Forwarded-Encrypted: i=1; AJvYcCXikhETTZR29RqVKR8+Ne0PU48zAG/BjuodGTsYSda2xRONqjhljUPVtEkDzg3PM0E2ISCkE72bCFDAkLw=@vger.kernel.org X-Gm-Message-State: AOJu0Yw6Bj186aHtCNraeOpSHMFiZ5+VI/fR8XpoZz+ZEZOWC6hd496P erXKzJ3BZvnAyC1psVFeOKqNenYYdzJ/WSFAya4zrWUefzQ8NtAqsxlnMPF/AQ== X-Google-Smtp-Source: AGHT+IF9p7J5BZDv8ll8pm5VjYD16tAS3siICKagFPpCHIlyW3VizX10tsflv0dnZZ6WrxJbxZ+ngQ== X-Received: by 2002:a05:6a00:9160:b0:714:1a71:cb0a with SMTP id d2e1a72fcca58-715e101f8camr23121192b3a.10.1725274635675; Mon, 02 Sep 2024 03:57:15 -0700 (PDT) Received: from tigerii.tok.corp.google.com ([2401:fa00:8f:203:43a1:71e3:7464:e91b]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-715e55a51e9sm6633769b3a.78.2024.09.02.03.57.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Sep 2024 03:57:15 -0700 (PDT) From: Sergey Senozhatsky To: Andrew Morton Cc: Minchan Kim , linux-kernel@vger.kernel.org, Sergey Senozhatsky Subject: [PATCHv7 06/24] zram: add lz4 compression backend support Date: Mon, 2 Sep 2024 19:55:54 +0900 Message-ID: <20240902105656.1383858-7-senozhatsky@chromium.org> X-Mailer: git-send-email 2.46.0.469.g59c65b2a67-goog In-Reply-To: <20240902105656.1383858-1-senozhatsky@chromium.org> References: <20240902105656.1383858-1-senozhatsky@chromium.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add s/w lz4 compression support. Signed-off-by: Sergey Senozhatsky --- drivers/block/zram/Kconfig | 11 +++++ drivers/block/zram/Makefile | 1 + drivers/block/zram/backend_lz4.c | 72 ++++++++++++++++++++++++++++++++ drivers/block/zram/backend_lz4.h | 10 +++++ drivers/block/zram/zcomp.c | 4 ++ 5 files changed, 98 insertions(+) create mode 100644 drivers/block/zram/backend_lz4.c create mode 100644 drivers/block/zram/backend_lz4.h diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig index 5d329a887b12..f1e76fc8431a 100644 --- a/drivers/block/zram/Kconfig +++ b/drivers/block/zram/Kconfig @@ -20,6 +20,12 @@ config ZRAM_BACKEND_LZO select LZO_COMPRESS select LZO_DECOMPRESS =20 +config ZRAM_BACKEND_LZ4 + bool "lz4 compression support" + depends on ZRAM + select LZ4_COMPRESS + select LZ4_DECOMPRESS + choice prompt "Default zram compressor" default ZRAM_DEF_COMP_LZORLE @@ -33,12 +39,17 @@ config ZRAM_DEF_COMP_LZO bool "lzo" depends on ZRAM_BACKEND_LZO =20 +config ZRAM_DEF_COMP_LZ4 + bool "lz4" + depends on ZRAM_BACKEND_LZ4 + endchoice =20 config ZRAM_DEF_COMP string default "lzo-rle" if ZRAM_DEF_COMP_LZORLE default "lzo" if ZRAM_DEF_COMP_LZO + default "lz4" if ZRAM_DEF_COMP_LZ4 default "unset-value" =20 config ZRAM_WRITEBACK diff --git a/drivers/block/zram/Makefile b/drivers/block/zram/Makefile index 2a3db3368af9..567f4434aee8 100644 --- a/drivers/block/zram/Makefile +++ b/drivers/block/zram/Makefile @@ -3,5 +3,6 @@ zram-y :=3D zcomp.o zram_drv.o =20 zram-$(CONFIG_ZRAM_BACKEND_LZO) +=3D backend_lzorle.o backend_lzo.o +zram-$(CONFIG_ZRAM_BACKEND_LZ4) +=3D backend_lz4.o =20 obj-$(CONFIG_ZRAM) +=3D zram.o diff --git a/drivers/block/zram/backend_lz4.c b/drivers/block/zram/backend_= lz4.c new file mode 100644 index 000000000000..c1d19fed5af2 --- /dev/null +++ b/drivers/block/zram/backend_lz4.c @@ -0,0 +1,72 @@ +#include +#include +#include +#include + +#include "backend_lz4.h" + +struct lz4_ctx { + void *mem; + s32 level; +}; + +static void lz4_destroy(void *ctx) +{ + struct lz4_ctx *zctx =3D ctx; + + vfree(zctx->mem); + kfree(zctx); +} + +static void *lz4_create(void) +{ + struct lz4_ctx *ctx; + + ctx =3D kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + /* @FIXME: using a hardcoded LZ4_ACCELERATION_DEFAULT for now */ + ctx->level =3D LZ4_ACCELERATION_DEFAULT; + ctx->mem =3D vmalloc(LZ4_MEM_COMPRESS); + if (!ctx->mem) + goto error; + + return ctx; +error: + lz4_destroy(ctx); + return NULL; +} + +static int lz4_compress(void *ctx, const unsigned char *src, size_t src_le= n, + unsigned char *dst, size_t *dst_len) +{ + struct lz4_ctx *zctx =3D ctx; + int ret; + + ret =3D LZ4_compress_fast(src, dst, src_len, *dst_len, + zctx->level, zctx->mem); + if (!ret) + return -EINVAL; + *dst_len =3D ret; + return 0; +} + +static int lz4_decompress(void *ctx, const unsigned char *src, + size_t src_len, unsigned char *dst, size_t dst_len) +{ + int ret; + + ret =3D LZ4_decompress_safe(src, dst, src_len, dst_len); + if (ret < 0) + return -EINVAL; + return 0; +} + +const struct zcomp_ops backend_lz4 =3D { + .compress =3D lz4_compress, + .decompress =3D lz4_decompress, + .create_ctx =3D lz4_create, + .destroy_ctx =3D lz4_destroy, + .name =3D "lz4", +}; diff --git a/drivers/block/zram/backend_lz4.h b/drivers/block/zram/backend_= lz4.h new file mode 100644 index 000000000000..c11fa602a703 --- /dev/null +++ b/drivers/block/zram/backend_lz4.h @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#ifndef __BACKEND_LZ4_H__ +#define __BACKEND_LZ4_H__ + +#include "zcomp.h" + +extern const struct zcomp_ops backend_lz4; + +#endif /* __BACKEND_LZ4_H__ */ diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c index a49d3e355c23..5da64e8fc798 100644 --- a/drivers/block/zram/zcomp.c +++ b/drivers/block/zram/zcomp.c @@ -14,11 +14,15 @@ =20 #include "backend_lzo.h" #include "backend_lzorle.h" +#include "backend_lz4.h" =20 static const struct zcomp_ops *backends[] =3D { #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZO) &backend_lzorle, &backend_lzo, +#endif +#if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZ4) + &backend_lz4, #endif NULL }; --=20 2.46.0.469.g59c65b2a67-goog