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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5514FC433EF for ; Mon, 17 Jan 2022 13:31:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B11D36B0071; Mon, 17 Jan 2022 08:31:58 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A9A1E6B0073; Mon, 17 Jan 2022 08:31:58 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 962666B0074; Mon, 17 Jan 2022 08:31:58 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0113.hostedemail.com [216.40.44.113]) by kanga.kvack.org (Postfix) with ESMTP id 852236B0071 for ; Mon, 17 Jan 2022 08:31:58 -0500 (EST) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 3ADD7181D7ED5 for ; Mon, 17 Jan 2022 13:31:58 +0000 (UTC) X-FDA: 79039867116.05.A8603D1 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by imf13.hostedemail.com (Postfix) with ESMTP id 4A83F20004 for ; Mon, 17 Jan 2022 13:31:57 +0000 (UTC) Received: from dggpemm500022.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Jct563ZrtzZf8V; Mon, 17 Jan 2022 21:28:10 +0800 (CST) Received: from dggpemm500003.china.huawei.com (7.185.36.56) by dggpemm500022.china.huawei.com (7.185.36.162) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Mon, 17 Jan 2022 21:31:52 +0800 Received: from [10.174.185.129] (10.174.185.129) by dggpemm500003.china.huawei.com (7.185.36.56) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Mon, 17 Jan 2022 21:31:52 +0800 Message-ID: Date: Mon, 17 Jan 2022 21:31:52 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH] mm: reuse the unshared swapcache page in do_wp_page Content-Language: en-US To: David Hildenbrand CC: Andrew Morton , Linux-MM , Linux Kernel Mailing List , , Matthew Wilcox , "Linus Torvalds" References: <20220113140318.11117-1-zhangliang5@huawei.com> <172ccfbb-7e24-db21-7d84-8c8d8c3805fd@redhat.com> <9cd7eee2-91fd-ddb8-e47d-e8585e5baa05@redhat.com> From: "zhangliang (AG)" In-Reply-To: <9cd7eee2-91fd-ddb8-e47d-e8585e5baa05@redhat.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.174.185.129] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpemm500003.china.huawei.com (7.185.36.56) X-CFilter-Loop: Reflected X-Rspamd-Queue-Id: 4A83F20004 X-Stat-Signature: 6uewfspxgu4twyghnupkuhzbfydchocf Authentication-Results: imf13.hostedemail.com; dkim=none; spf=pass (imf13.hostedemail.com: domain of zhangliang5@huawei.com designates 45.249.212.187 as permitted sender) smtp.mailfrom=zhangliang5@huawei.com; dmarc=pass (policy=quarantine) header.from=huawei.com X-Rspamd-Server: rspam08 X-HE-Tag: 1642426317-62357 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Sure, I will do that :) On 2022/1/17 20:58, David Hildenbrand wrote: > On 17.01.22 03:11, zhangliang (AG) wrote: >> Hi, thank you very much for your patient reply, and I completely agree with the viewpoint from you and Linus about COW and reuse_swap_page(). :) >> > > If you have some sparse cycles, it would be great if you could see if > > https://github.com/davidhildenbrand/linux/tree/reuse_swap_page > > works as expected as well for your setup. > -- Best Regards, Liang Zhang