From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D589EC4332F for ; Sun, 9 Oct 2022 09:07:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229989AbiJIJHl (ORCPT ); Sun, 9 Oct 2022 05:07:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230021AbiJIJHd (ORCPT ); Sun, 9 Oct 2022 05:07:33 -0400 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2852723390 for ; Sun, 9 Oct 2022 02:07:32 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id i6so8465202pfb.2 for ; Sun, 09 Oct 2022 02:07:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; 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=sxrqiw0cbhfXN4+OelLD9+srPRQcNc3GlNvIAj2f+tU=; b=oe5qxBC1H4qUilQPWPy/moxJ4w1ln70cLpRc/Wk8jkmt3TBM5d7VJNyft5SpWN8+Hr V+SK/9WSNTNYqY8WLXByi/u6h7gRuxPzVFGafKEyR+Y8/tLdczZTPqNCD93xhD5PTkaY XKLkVqBfhhtAFrvw7K6Y4FSE3vUclNw6hsVzk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=sxrqiw0cbhfXN4+OelLD9+srPRQcNc3GlNvIAj2f+tU=; b=g0aHrsQ8Sx2+UH2uUrcdJWBbqNrYMD4sZ6G0EOBfpVk+YwCa0bUXiq+5/EoMKSKAYA BX/ScaDybuRseS9KkygbrK4g24TGDfJL3RpMbKz2S86iENoOe1R7kzNGUYZJGArAd6De 8re994jQLC6KJ+olegbuA6IVDmjaer8PfPE+LKuJFqz0wscaxEqwVpLNkEMJJuWeirbU sCVIqcppX+y4L7TDqkKbkI0hz/Ux34cvFOJNmDSJaembkzWtmL4Nmln5IZMYh9AY/Ml4 1jpHr+Dh/GlPtDAvI0DGrZWdJmyGydV9oTQHlDGtBkVu5H5X/XiJJLM6ua29Bc8/E4i8 j39Q== X-Gm-Message-State: ACrzQf15bv9pb7BvY77pPwPB24bzcsb6kgpJHPIfFEkKTGJAFeG1WqiK X6uoTuAHAh3sk5jUjMpJeIFbQA== X-Google-Smtp-Source: AMsMyM6C8IGN2Dj12wvsCAFdbafvyBhEfZJPCUlA+MTMr1Fg8ofJtLAKdkOUiWQsDUoA0tspOCcD7g== X-Received: by 2002:a63:b4d:0:b0:454:d8b4:285 with SMTP id a13-20020a630b4d000000b00454d8b40285mr11989075pgl.410.1665306451631; Sun, 09 Oct 2022 02:07:31 -0700 (PDT) Received: from tigerii.tok.corp.google.com ([2401:fa00:8f:203:8517:d51e:5fe9:9be7]) by smtp.gmail.com with ESMTPSA id q194-20020a632acb000000b00439d071c110sm4335148pgq.43.2022.10.09.02.07.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 09 Oct 2022 02:07:31 -0700 (PDT) From: Sergey Senozhatsky To: Minchan Kim , Andrew Morton Cc: Nitin Gupta , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Sergey Senozhatsky Subject: [PATCHv3 2/8] zram: Add recompression algorithm sysfs knob Date: Sun, 9 Oct 2022 18:07:14 +0900 Message-Id: <20221009090720.1040633-3-senozhatsky@chromium.org> X-Mailer: git-send-email 2.38.0.rc1.362.ged0d419d3c-goog In-Reply-To: <20221009090720.1040633-1-senozhatsky@chromium.org> References: <20221009090720.1040633-1-senozhatsky@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce recomp_algorithm sysfs knob that controls secondary algorithm selection used for recompression. This device attribute works in a similar way with comp_algorithm attribute. Signed-off-by: Sergey Senozhatsky --- drivers/block/zram/zram_drv.c | 111 +++++++++++++++++++++++++++------- 1 file changed, 90 insertions(+), 21 deletions(-) diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 770ea3489eb6..a8ef3c0c3dae 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -41,7 +41,12 @@ static DEFINE_IDR(zram_index_idr); static DEFINE_MUTEX(zram_index_mutex); static int zram_major; -static const char *default_compressor = CONFIG_ZRAM_DEF_COMP; +static const char *default_comp_algs[ZRAM_MAX_ZCOMPS] = { + CONFIG_ZRAM_DEF_COMP, +#ifdef CONFIG_ZRAM_MULTI_COMP + "zstd", +#endif +}; /* Module params (documentation at end) */ static unsigned int num_devices = 1; @@ -1000,31 +1005,37 @@ static ssize_t max_comp_streams_store(struct device *dev, return len; } -static ssize_t comp_algorithm_show(struct device *dev, - struct device_attribute *attr, char *buf) +static void comp_algorithm_set(struct zram *zram, u32 idx, const char *alg) { - size_t sz; - struct zram *zram = dev_to_zram(dev); + bool default_alg = false; + int i; - down_read(&zram->init_lock); - sz = zcomp_available_show(zram->comp_algs[ZRAM_PRIMARY_ZCOMP], buf); - up_read(&zram->init_lock); + /* Do not kfree() algs that we didn't allocate, IOW the default ones */ + for (i = 0; i < ZRAM_MAX_ZCOMPS; i++) { + if (zram->comp_algs[idx] == default_comp_algs[i]) { + default_alg = true; + break; + } + } - return sz; + if (!default_alg) + kfree(zram->comp_algs[idx]); + zram->comp_algs[idx] = alg; } -static void comp_algorithm_set(struct zram *zram, u32 idx, const char *alg) +static ssize_t __comp_algorithm_show(struct zram *zram, u32 idx, char *buf) { - /* Do not kfree() algs that we didn't allocate, IOW the default ones */ - if (zram->comp_algs[idx] != default_compressor) - kfree(zram->comp_algs[idx]); - zram->comp_algs[idx] = alg; + ssize_t sz; + + down_read(&zram->init_lock); + sz = zcomp_available_show(zram->comp_algs[idx], buf); + up_read(&zram->init_lock); + + return sz; } -static ssize_t comp_algorithm_store(struct device *dev, - struct device_attribute *attr, const char *buf, size_t len) +static int __comp_algorithm_store(struct zram *zram, u32 idx, const char *buf) { - struct zram *zram = dev_to_zram(dev); char *compressor; size_t sz; @@ -1053,11 +1064,55 @@ static ssize_t comp_algorithm_store(struct device *dev, return -EBUSY; } - comp_algorithm_set(zram, ZRAM_PRIMARY_ZCOMP, compressor); + comp_algorithm_set(zram, idx, compressor); up_write(&zram->init_lock); - return len; + return 0; +} + +static ssize_t comp_algorithm_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct zram *zram = dev_to_zram(dev); + + return __comp_algorithm_show(zram, ZRAM_PRIMARY_ZCOMP, buf); +} + +static ssize_t comp_algorithm_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct zram *zram = dev_to_zram(dev); + int ret; + + ret = __comp_algorithm_store(zram, ZRAM_PRIMARY_ZCOMP, buf); + return ret ? ret : len; } +#ifdef CONFIG_ZRAM_MULTI_COMP +static ssize_t recomp_algorithm_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct zram *zram = dev_to_zram(dev); + + return __comp_algorithm_show(zram, ZRAM_SECONDARY_ZCOMP, buf); +} + +static ssize_t recomp_algorithm_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct zram *zram = dev_to_zram(dev); + int ret; + + ret = __comp_algorithm_store(zram, ZRAM_SECONDARY_ZCOMP, buf); + return ret ? ret : len; +} +#endif + static ssize_t compact_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { @@ -1762,7 +1817,11 @@ static void zram_reset_device(struct zram *zram) memset(&zram->stats, 0, sizeof(zram->stats)); reset_bdev(zram); - comp_algorithm_set(zram, ZRAM_PRIMARY_ZCOMP, default_compressor); + comp_algorithm_set(zram, ZRAM_PRIMARY_ZCOMP, + default_comp_algs[ZRAM_PRIMARY_ZCOMP]); + if (IS_ENABLED(CONFIG_ZRAM_MULTI_COMP)) + comp_algorithm_set(zram, ZRAM_SECONDARY_ZCOMP, + default_comp_algs[ZRAM_SECONDARY_ZCOMP]); up_write(&zram->init_lock); } @@ -1895,6 +1954,9 @@ static DEVICE_ATTR_WO(writeback); static DEVICE_ATTR_RW(writeback_limit); static DEVICE_ATTR_RW(writeback_limit_enable); #endif +#ifdef CONFIG_ZRAM_MULTI_COMP +static DEVICE_ATTR_RW(recomp_algorithm); +#endif static struct attribute *zram_disk_attrs[] = { &dev_attr_disksize.attr, @@ -1918,6 +1980,9 @@ static struct attribute *zram_disk_attrs[] = { &dev_attr_bd_stat.attr, #endif &dev_attr_debug_stat.attr, +#ifdef CONFIG_ZRAM_MULTI_COMP + &dev_attr_recomp_algorithm.attr, +#endif NULL, }; @@ -1997,7 +2062,11 @@ static int zram_add(void) if (ret) goto out_cleanup_disk; - zram->comp_algs[ZRAM_PRIMARY_ZCOMP] = default_compressor; + zram->comp_algs[ZRAM_PRIMARY_ZCOMP] = + default_comp_algs[ZRAM_PRIMARY_ZCOMP]; + if (IS_ENABLED(CONFIG_ZRAM_MULTI_COMP)) + zram->comp_algs[ZRAM_SECONDARY_ZCOMP] = + default_comp_algs[ZRAM_SECONDARY_ZCOMP]; zram_debugfs_register(zram); pr_info("Added device: %s\n", zram->disk->disk_name); -- 2.38.0.rc1.362.ged0d419d3c-goog