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Tue, 03 Nov 2026 02:48:15 -0800 (PST) Message-ID: <1ac14e11-ea67-405d-a212-d084ba394dbd@gmail.com> Date: Tue, 3 Nov 2026 11:48:14 +0100 X-Archived-By: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/5] selftests/mm: test a partial mremap() of hugetlb memory To: Josef Bacik , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , David Hildenbrand Cc: Vlastimil Babka , Jann Horn , Pedro Falcato , Muchun Song , Oscar Salvador , linux-mm@kvack.org References: <20261102-b4-mremap-pre-split-v2-0-d281dd11ad7d@toxicpanda.com> <20261102-b4-mremap-pre-split-v2-2-d281dd11ad7d@toxicpanda.com> Content-Language: en-US From: "Jose A. Perez de Azpillaga" In-Reply-To: <20261102-b4-mremap-pre-split-v2-2-d281dd11ad7d@toxicpanda.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-9.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_PASS,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-Rspamd-Server: rspam09 X-Stat-Signature: 768x3uxe9xypoh4a9cmqthn9rou6hgk9 X-Rspamd-Queue-Id: EC79540005 X-Rspam-User: X-HE-Tag: 1793702897-988407 X-HE-Meta: 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 86pkTbzs 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On 11/3/26 12:45 AM, Josef Bacik wrote: > hugetlb-mremap only moves whole mappings, so it did not catch the > reservation leak of a partial move. > > Map four private huge pages without touching them, move the second one, > unmap everything, and check that the number of reserved huge pages is back > where it was. > > Signed-off-by: Josef Bacik > > Acked-by: Lorenzo Stoakes (ARM) LGTM: Reviewed-by: Jose A. Perez de Azpillaga -- cheers, jose a. p-a