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[2003:cb:c703:500:9382:2e5a:fea:8889]) by smtp.gmail.com with ESMTPSA id m24-20020a056000181800b00296730b5c3esm5554570wrh.102.2023.01.02.08.59.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 Jan 2023 08:59:03 -0800 (PST) Message-ID: <6c3725b7-53af-bcc7-2a58-a35b2bc08b4f@redhat.com> Date: Mon, 2 Jan 2023 17:59:01 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.6.0 Subject: Re: [PATCH v4] selftest/vm: add mremap expand merge offset test To: Lorenzo Stoakes , linux-mm@kvack.org, Andrew Morton , Shuah Khan , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Vlastimil Babka , Jakub Matena , Matthew Wilcox , Mel Gorman , Michal Hocko References: <02b117a8ffd52acc01dc66c2fb39754f08d92c0e.1672675824.git.lstoakes@gmail.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <02b117a8ffd52acc01dc66c2fb39754f08d92c0e.1672675824.git.lstoakes@gmail.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 0FF05180003 X-Stat-Signature: nspm3o4jsjyo75kgfrzdafj43mtazxg3 X-Rspam-User: X-HE-Tag: 1672678746-395510 X-HE-Meta: U2FsdGVkX1+TFWlDGIVBi0UDVF0AsaSfzb83iRnRR/HFPza8x0mUpyLZpRrhOhvXvXtA1+/BtGbwLTl7c2ehnJcs6o0r+Wf4CE2DCo3g9JTZ9DxDIGu02xWKVtjAFPwqW4SiUdZl5hP+FexJH9xfbw7FqFblD1lMN6N8sc4pYC2JN+igtaorie5oOy/ON6nggg/5GS+17jF2aM1to9cCL4M4lmEy2KTNNjKgt5j1QV4ViIidtAQfN8dMAxxtqnxsLKvAzQxVNNLG7PMJHefLdLFrWx5V4wcUqyXq2xpXQ9yqnUfFu0eCjysMqDB+f7er+Jb36Ef7/UlZcdzoqp0mddnULNV/IaKC1JdhoBidr9FP9xkE0W7chJhGPBv0hAYJ/iX8Oag84f7dIwc3Qamk1qR+Mx2nwRK81HR0hoUwGnQ7vOkTSpgjhs0vNkjboq7LmeWHcECNPfhIS4UASseIOCiaH26IkI4wNFfNBo148YcC58GOJKIX/0cEBAj6eoUV978kkJy6OVFRKaQeB7fHuHab9IpHRxcZGTgH7wLLLEqxL9NYtCPi2MwiyuCiG6zrvJs87pmebcK91PYVNsATchR7UILLRZShOeN70wv5lGR2AY8TtHP6Xtr4RSEFVAQmbN0iPmNlOyjSHTNE2t8PY3GqjLzeT30RkleLxOFUHKKyApIf8hWlb8gfCR+HjN/Ezo8wnHcFQW7csmMJREWbnjFjnCMhAVWIOhi3xDOhiCH+TZcZVKTFhR6AOhQxF9uDZ0V52Q0pWnN6KY5241utoY2i11UNdyupAGZyVU/XjcF8j97LTyHBixcMy3G0S9tZOk+8wsDo5lkrAO5hNJpnXM57mGw1DnLu1F9uvqK7yLDKZW8DIw40cUHVK3HEe2nNCCn6ZwIn4M8AcMbGFI5vFINOEoCMTwdIQO4OnCrWHWwcS7pq9pSz9+mjOhYJOyQ3Pskxr+NPzy9IFcZAZ4k hq3oLs4T nh7JfLGq/5jivFJcsEdhCxB3BUQF5FhxCG0Xp6CnZ6KgiL9eDpytMtxQaoNZQZAa3IIIQXLhYjmhEjLjaIwnAk4yU4kJaCzJXhJQiPtRsqf4CIrsnHEf8EFGHqF6c7oxCI3XWsvDpKRrsHQY= 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 02.01.23 17:11, Lorenzo Stoakes wrote: > Add a test to assert that we can mremap() and expand a mapping starting > from an offset within an existing mapping. We unmap the last page in a 3 > page mapping to ensure that the remap should always succeed, before > remapping from the 2nd page. > > This is additionally a regression test for the issue solved in "mm, mremap: > fix mremap() expanding vma with addr inside vma" and confirmed to fail > prior to the change and pass after it. > > Finally, this patch updates the existing mremap expand merge test to check > error conditions and reduce code duplication between the two tests. > > Signed-off-by: Lorenzo Stoakes > --- Acked-by: David Hildenbrand -- Thanks, David / dhildenb