From nobody Thu Dec 18 15:43:11 2025 Received: from mail-pl1-f173.google.com (mail-pl1-f173.google.com [209.85.214.173]) (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 8486E1422BB for ; Mon, 6 May 2024 07:58:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714982337; cv=none; b=dMsqpB0mrmSgfcb32IOCIipCAr8qtX9SYQ3Je8ANBpIzZShxahpoxFgC5Ql87veXd8CQmLMNahVklQiWn8h15CRX1HROZRCyiMGMEobntb6lYr8TVAHGztc1ExhA5L7WkvnPXtKp/V5mt0TsjAu6nvvwrnCVnxzOawLtXnmFLz4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714982337; c=relaxed/simple; bh=8iuEInzIc8LpvQjmTn+1sUuxsPZjdX9h9ql/8Ate56k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sYapcJoNMnkXVayC7QwaunDi2lssOK3EjkZxemdUNRcYmKaH5+95S5IMHA2UbXU3P+VvVbMXbzq/yLr16jLhQZGlaKSnBx5GVqCCyvKZHbPYqtZElvhEK0eGqGeV/dUW+SJjLtEC3pdG5fYmAAIsFMLyeo6nH6bbtLAkz39DvaY= 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=V+xbILaB; arc=none smtp.client-ip=209.85.214.173 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="V+xbILaB" Received: by mail-pl1-f173.google.com with SMTP id d9443c01a7336-1ec486198b6so11722015ad.1 for ; Mon, 06 May 2024 00:58:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1714982335; x=1715587135; 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=AqdQ0YWyhNoNXU+2X1vjHodTilUScpd/3IsqcqsqLiU=; b=V+xbILaBJEiuWm2uqTe3IfxciTcIXcRJ+U3p1WCfEzCfKfhDQrmJ/+q1O1u52g2hbP F0fVFN1px9FMONAQZSFuLwi7AfRNpPhlBSpuqAVtda4CCtHCROMal0vnZwjCPLrzuhWf Nfj2Hja+ZVq8PSYgNHAx0Rn2wm6hVcGfuYses= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1714982335; x=1715587135; 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=AqdQ0YWyhNoNXU+2X1vjHodTilUScpd/3IsqcqsqLiU=; b=D0Ke5U4e2l3+n+6L4k1gF6ymKlwb+ilGSaLGdZPP05X0PPPmV9wLocjkgO3HBW0cp+ hQDHamf6qS6KVP2AAR3/i+/RjRevDKqj6jLyEDuL4f33j8U1eRF73oX2EU3aDLLV2QqS iN5GqKAIztyZLGs4YIkDjlN+OsbVFsgdsjOd/D/hNDhMBSd1PSjkYdjds78elRbi6Y26 UAlosLwOi8aFboDnp+neal5sSisW5NYr2/KvUAbfJ3EJmedsbc0JhoZnlfI9oXBWHgHC JSsYn8OCHuTOE4YvplSly9L9c/6rnaCGZ9JoFA57MeSh9X3tOR/fnY3iwgBrInZcO8V8 VuHw== X-Gm-Message-State: AOJu0YxT2lVO37mLtm8zqm5FBCX6GQcAjygA+RLV24v53ztp8z1wzVr0 kazLe4h6nkhAs76I/8ejxMUGyPzCgVxD5NIfBl3ElDtXfqAIj8HXST7R4s6Fgz3kE0LyBj02TOc = X-Google-Smtp-Source: AGHT+IHZhQ4b8tdZyzaV0NrXU0v8rY+bsI60IyNZYj8K0IP2NFhpywlMWf7NCyQJdVaOVElcnD70Jw== X-Received: by 2002:a17:902:be08:b0:1e7:b6f4:971 with SMTP id r8-20020a170902be0800b001e7b6f40971mr7734763pls.27.1714982334810; Mon, 06 May 2024 00:58:54 -0700 (PDT) Received: from tigerii.tok.corp.google.com ([2401:fa00:8f:203:4e24:10c3:4b65:e126]) by smtp.gmail.com with ESMTPSA id h6-20020a170902f54600b001ec64b128dasm7633772plf.129.2024.05.06.00.58.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 May 2024 00:58:54 -0700 (PDT) From: Sergey Senozhatsky To: Andrew Morton , Minchan Kim Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, Sergey Senozhatsky Subject: [PATCHv2 04/17] zram: add lz4hc compression backend support Date: Mon, 6 May 2024 16:58:17 +0900 Message-ID: <20240506075834.302472-5-senozhatsky@chromium.org> X-Mailer: git-send-email 2.45.0.rc1.225.g2a3ae87e7f-goog In-Reply-To: <20240506075834.302472-1-senozhatsky@chromium.org> References: <20240506075834.302472-1-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" Signed-off-by: Sergey Senozhatsky --- drivers/block/zram/Kconfig | 11 +++++ drivers/block/zram/Makefile | 5 ++- drivers/block/zram/backend_lz4hc.c | 72 ++++++++++++++++++++++++++++++ drivers/block/zram/backend_lz4hc.h | 10 +++++ drivers/block/zram/zcomp.c | 4 ++ 5 files changed, 100 insertions(+), 2 deletions(-) create mode 100644 drivers/block/zram/backend_lz4hc.c create mode 100644 drivers/block/zram/backend_lz4hc.h diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig index f1e76fc8431a..0d890a8d2dc4 100644 --- a/drivers/block/zram/Kconfig +++ b/drivers/block/zram/Kconfig @@ -26,6 +26,12 @@ config ZRAM_BACKEND_LZ4 select LZ4_COMPRESS select LZ4_DECOMPRESS =20 +config ZRAM_BACKEND_LZ4HC + bool "lz4hc compression support" + depends on ZRAM + select LZ4HC_COMPRESS + select LZ4_DECOMPRESS + choice prompt "Default zram compressor" default ZRAM_DEF_COMP_LZORLE @@ -43,6 +49,10 @@ config ZRAM_DEF_COMP_LZ4 bool "lz4" depends on ZRAM_BACKEND_LZ4 =20 +config ZRAM_DEF_COMP_LZ4HC + bool "lz4hc" + depends on ZRAM_BACKEND_LZ4HC + endchoice =20 config ZRAM_DEF_COMP @@ -50,6 +60,7 @@ config ZRAM_DEF_COMP default "lzo-rle" if ZRAM_DEF_COMP_LZORLE default "lzo" if ZRAM_DEF_COMP_LZO default "lz4" if ZRAM_DEF_COMP_LZ4 + default "lz4hc" if ZRAM_DEF_COMP_LZ4HC default "unset-value" =20 config ZRAM_WRITEBACK diff --git a/drivers/block/zram/Makefile b/drivers/block/zram/Makefile index 1be5d2657960..815b45471c7d 100644 --- a/drivers/block/zram/Makefile +++ b/drivers/block/zram/Makefile @@ -1,7 +1,8 @@ # SPDX-License-Identifier: GPL-2.0-only =20 -obj-$(CONFIG_ZRAM_BACKEND_LZO) +=3D backend_lzorle.o backend_lzo.o -obj-$(CONFIG_ZRAM_BACKEND_LZ4) +=3D backend_lz4.o +obj-$(CONFIG_ZRAM_BACKEND_LZO) +=3D backend_lzorle.o backend_lzo.o +obj-$(CONFIG_ZRAM_BACKEND_LZ4) +=3D backend_lz4.o +obj-$(CONFIG_ZRAM_BACKEND_LZ4HC) +=3D backend_lz4hc.o =20 zram-y :=3D zcomp.o zram_drv.o =20 diff --git a/drivers/block/zram/backend_lz4hc.c b/drivers/block/zram/backen= d_lz4hc.c new file mode 100644 index 000000000000..5c437623aa65 --- /dev/null +++ b/drivers/block/zram/backend_lz4hc.c @@ -0,0 +1,72 @@ +#include +#include +#include +#include + +#include "backend_lz4hc.h" + +struct lz4hc_ctx { + void *mem; + s32 level; +}; + +static void lz4hc_destroy(void *ctx) +{ + struct lz4hc_ctx *zctx =3D ctx; + + vfree(zctx->mem); + kfree(zctx); +} + +static void *lz4hc_create(void) +{ + struct lz4hc_ctx *ctx; + + ctx =3D kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + ctx->mem =3D vmalloc(LZ4HC_MEM_COMPRESS); + if (!ctx->mem) { + lz4hc_destroy(ctx); + return NULL; + } + + /* @FIXME: using a hardcoded LZ4HC_DEFAULT_CLEVEL for now */ + ctx->level =3D LZ4HC_DEFAULT_CLEVEL; + return ctx; +} + +static int lz4hc_compress(void *ctx, const unsigned char *src, + unsigned char *dst, size_t *dst_len) +{ + struct lz4hc_ctx *zctx =3D ctx; + int ret; + + ret =3D LZ4_compress_HC(src, dst, PAGE_SIZE, *dst_len, + zctx->level, zctx->mem); + if (!ret) + return -EINVAL; + *dst_len =3D ret; + return 0; +} + +static int lz4hc_decompress(void *ctx, const unsigned char *src, + size_t src_len, unsigned char *dst) +{ + int dst_len =3D PAGE_SIZE; + int ret; + + ret =3D LZ4_decompress_safe(src, dst, src_len, dst_len); + if (ret < 0) + return -EINVAL; + return 0; +} + +struct zcomp_backend backend_lz4hc =3D { + .compress =3D lz4hc_compress, + .decompress =3D lz4hc_decompress, + .create_ctx =3D lz4hc_create, + .destroy_ctx =3D lz4hc_destroy, + .name =3D "lz4hc", +}; diff --git a/drivers/block/zram/backend_lz4hc.h b/drivers/block/zram/backen= d_lz4hc.h new file mode 100644 index 000000000000..29c428a850e2 --- /dev/null +++ b/drivers/block/zram/backend_lz4hc.h @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#ifndef __BACKEND_LZ4HC_H__ +#define __BACKEND_LZ4HC_H__ + +#include "zcomp.h" + +extern struct zcomp_backend backend_lz4hc; + +#endif /* __BACKEND_LZ4HC_H__ */ diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c index 902bdaf7e299..f04f5844a23c 100644 --- a/drivers/block/zram/zcomp.c +++ b/drivers/block/zram/zcomp.c @@ -18,6 +18,7 @@ #include "backend_lzo.h" #include "backend_lzorle.h" #include "backend_lz4.h" +#include "backend_lz4hc.h" =20 static struct zcomp_backend *backends[] =3D { #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZO) @@ -26,6 +27,9 @@ static struct zcomp_backend *backends[] =3D { #endif #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZ4) &backend_lz4, +#endif +#if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZ4HC) + &backend_lz4hc, #endif NULL }; --=20 2.45.0.rc1.225.g2a3ae87e7f-goog