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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 Content-Language: en-US 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> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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