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 35D5DC0502E for ; Mon, 29 Aug 2022 12:58:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230106AbiH2M6A (ORCPT ); Mon, 29 Aug 2022 08:58:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50182 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230308AbiH2M4g (ORCPT ); Mon, 29 Aug 2022 08:56:36 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2222CF5B1 for ; Mon, 29 Aug 2022 05:48:36 -0700 (PDT) Received: from dggpemm500020.china.huawei.com (unknown [172.30.72.54]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4MGVVz3fFGzYd0m; Mon, 29 Aug 2022 20:44:11 +0800 (CST) Received: from dggpemm100009.china.huawei.com (7.185.36.113) by dggpemm500020.china.huawei.com (7.185.36.49) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 29 Aug 2022 20:48:33 +0800 Received: from huawei.com (10.175.113.32) by dggpemm100009.china.huawei.com (7.185.36.113) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 29 Aug 2022 20:48:33 +0800 From: Liu Shixin To: Seth Jennings , Dan Streetman , Vitaly Wool , Andrew Morton , Nathan Chancellor , "Christoph Hellwig" CC: , , Liu Shixin , Kefeng Wang Subject: [PATCH -next v4 0/6] Delay the initializaton of zswap Date: Mon, 29 Aug 2022 21:22:56 +0800 Message-ID: <20220829132302.3367054-1-liushixin2@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.113.32] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpemm100009.china.huawei.com (7.185.36.113) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In the initialization of zswap, about 18MB memory will be allocated for zswap_pool. Since not all users use zswap, the memory may be wasted. Save the memory for these users by delaying the initialization of zswap to first enablement. v3->v4: Revert three patches to replace previous patch[1-2] suggested by Vitaly. v2->v3: Fix frontswap_ops NULL reported by Nathan and add init for online swap device in backend register. v1->v2: Change init_zswap to zswap_init suggested by Andrew. Liu Shixin (6): Revert "frontswap: remove support for multiple ops" Revert "mm: mark swap_lock and swap_active_head static" Revert "frontswap: simplify frontswap_register_ops" mm/zswap: replace zswap_init_{started/failed} with zswap_init_state mm/zswap: delay the initializaton of zswap until the first enablement mm/zswap: skip confusing print info include/linux/frontswap.h | 3 +- include/linux/swapfile.h | 2 + mm/frontswap.c | 91 +++++++++++++++++++++++++++++++++------ mm/swapfile.c | 4 +- mm/zswap.c | 85 +++++++++++++++++++++++++----------- 5 files changed, 145 insertions(+), 40 deletions(-) -- 2.25.1