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 536EFC7619A for ; Sat, 25 Mar 2023 06:24:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232110AbjCYGYc (ORCPT ); Sat, 25 Mar 2023 02:24:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44530 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230133AbjCYGYb (ORCPT ); Sat, 25 Mar 2023 02:24:31 -0400 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 01FC315174 for ; Fri, 24 Mar 2023 23:24:25 -0700 (PDT) Received: from dggpemm100009.china.huawei.com (unknown [172.30.72.56]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4Pk8DF1KNjzKmMW; Sat, 25 Mar 2023 14:23:57 +0800 (CST) 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 15.1.2507.21; Sat, 25 Mar 2023 14:24:21 +0800 From: Liu Shixin To: Seth Jennings , Dan Streetman , Vitaly Wool , Andrew Morton , Nathan Chancellor , Christoph Hellwig CC: , , Liu Shixin Subject: [PATCH -next v7 0/4] Delay the initialization of zswap Date: Sat, 25 Mar 2023 15:14:16 +0800 Message-ID: <20230325071420.2246461-1-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 some users may not use zswap, the zswap_pool is wasted. Save memory by delaying the initialization of zswap until enabled. v6->v7: Add two new patch[1,3] to cleanup the code. And cover zswap_init_* parameter by zswap_init_lock to protect against conflicts. v5->v6: Simplify the code and delete the patches about frontswap suggested by Christoph. Liu Shixin (4): mm/zswap: remove zswap_entry_cache_{create,destroy} helper function mm/zswap: skip invalid or unchanged parameter mm/zswap: replace zswap_init_{started/failed} with zswap_init_state mm/zswap: delay the initializaton of zswap mm/zswap.c | 94 +++++++++++++++++++++++++++++++++++------------------- 1 file changed, 61 insertions(+), 33 deletions(-) -- 2.25.1