From nobody Thu Dec 18 05:40:24 2025 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 80D60C77B76 for ; Tue, 18 Apr 2023 06:25:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230497AbjDRGZ0 (ORCPT ); Tue, 18 Apr 2023 02:25:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58082 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230064AbjDRGZS (ORCPT ); Tue, 18 Apr 2023 02:25:18 -0400 Received: from mx.sberdevices.ru (mx.sberdevices.ru [45.89.227.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E6FE11BDA for ; Mon, 17 Apr 2023 23:25:16 -0700 (PDT) Received: from s-lin-edge02.sberdevices.ru (localhost [127.0.0.1]) by mx.sberdevices.ru (Postfix) with ESMTP id 266405FD5B; Tue, 18 Apr 2023 09:25:15 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1681799115; bh=nfgD8CjAt52uLbsRtpG0YlGKoerIw5fnKcSwfy+g/JE=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=Du1ijEM7jXPQlYLuCqUkwMDR9U6uHlm6GPfjO87RePxjdfiJ3HQcQMppmp9vOJMtF xxWMiFe5HXJ+lG5kzPeyi5gj8ZGjqGKoNtjfjzvqGESrMKLf2uhwaj4AN68AtkxZD+ NZvOVJx1Rwgnsc/pqJ9JXd9y55I3ivJkOHeOwp03gKMw6KteyWXpcX/UoVO5D7oDsu DSpS8ifEQvhW3Vg5pfxkgCMeCZ9ps3vSLX/fyIEbti8oxad6yNwA3Ag6Um9OOMLOfn 17xdFTei6ZJBk+cPmnXN/ZGWsmujHQwqIgJqlB+MRUmLSvo9dFHza6kce8z8LBEcOe BmtLDmjOOYRgQ== Received: from S-MS-EXCH01.sberdevices.ru (S-MS-EXCH01.sberdevices.ru [172.16.1.4]) by mx.sberdevices.ru (Postfix) with ESMTP; Tue, 18 Apr 2023 09:25:15 +0300 (MSK) From: Alexey Romanov To: , , CC: , , , Alexey Romanov Subject: [RFC PATCH v1 4/5] zram: add fold sysfs knob Date: Tue, 18 Apr 2023 09:25:02 +0300 Message-ID: <20230418062503.62121-5-avromanov@sberdevices.ru> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20230418062503.62121-1-avromanov@sberdevices.ru> References: <20230418062503.62121-1-avromanov@sberdevices.ru> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [172.16.1.6] X-ClientProxiedBy: S-MS-EXCH02.sberdevices.ru (172.16.1.5) To S-MS-EXCH01.sberdevices.ru (172.16.1.4) X-KSMG-Rule-ID: 4 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Status: not scanned, disabled by settings X-KSMG-AntiSpam-Interceptor-Info: not scanned X-KSMG-AntiPhishing: not scanned, disabled by settings X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 1.1.2.30, bases: 2023/04/18 02:02:00 #21122658 X-KSMG-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Allow zram to fold identical zsmalloc objects into single one: echo 1 > /sys/block/zramX/fold Signed-off-by: Alexey Romanov --- drivers/block/zram/zram_drv.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index e290d6d97047..06a614d1643d 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1184,6 +1184,25 @@ static ssize_t compact_store(struct device *dev, return len; } =20 +#ifdef CONFIG_ZSMALLOC_FOLD +static ssize_t fold_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct zram *zram =3D dev_to_zram(dev); + + down_read(&zram->init_lock); + if (!init_done(zram)) { + up_read(&zram->init_lock); + return -EINVAL; + } + + zs_fold(zram->mem_pool); + up_read(&zram->init_lock); + + return len; +} +#endif + static ssize_t io_stat_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -2313,6 +2332,9 @@ static DEVICE_ATTR_RW(writeback_limit_enable); static DEVICE_ATTR_RW(recomp_algorithm); static DEVICE_ATTR_WO(recompress); #endif +#ifdef CONFIG_ZSMALLOC_FOLD +static DEVICE_ATTR_WO(fold); +#endif =20 static struct attribute *zram_disk_attrs[] =3D { &dev_attr_disksize.attr, @@ -2339,6 +2361,9 @@ static struct attribute *zram_disk_attrs[] =3D { #ifdef CONFIG_ZRAM_MULTI_COMP &dev_attr_recomp_algorithm.attr, &dev_attr_recompress.attr, +#endif +#ifdef CONFIG_ZSMALLOC_FOLD + &dev_attr_fold.attr, #endif NULL, }; --=20 2.38.1