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[2003:cb:c705:dd00:68a1:1bd:6733:bde9]) by smtp.gmail.com with ESMTPSA id s22sm18046060wmc.1.2022.01.17.04.58.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 17 Jan 2022 04:58:47 -0800 (PST) Message-ID: <9cd7eee2-91fd-ddb8-e47d-e8585e5baa05@redhat.com> Date: Mon, 17 Jan 2022 13:58:46 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.4.0 Subject: Re: [PATCH] mm: reuse the unshared swapcache page in do_wp_page To: "zhangliang (AG)" Cc: Andrew Morton , Linux-MM , Linux Kernel Mailing List , wangzhigang17@huawei.com, Matthew Wilcox , Linus Torvalds References: <20220113140318.11117-1-zhangliang5@huawei.com> <172ccfbb-7e24-db21-7d84-8c8d8c3805fd@redhat.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 0B99B40007 X-Stat-Signature: zs9xa5ckpf8aeok3g4i6qwxoarxg47g9 Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=MaeBtDQM; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf04.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.133.124) smtp.mailfrom=david@redhat.com X-Rspamd-Server: rspam02 X-HE-Tag: 1642424362-15145 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: 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. -- Thanks, David / dhildenb