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Howlett" , "Nico Pache" , "Ryan Roberts" , "Dev Jain" , "Barry Song" , "Lance Yang" , "Usama Arif" , "Vlastimil Babka" , "Mike Rapoport" , "Suren Baghdasaryan" , "Michal Hocko" , "Shuah Khan" , "Kevin Brodsky" From: "Zi Yan" Subject: Re: [PATCH v7 3/3] kselftest: mm: remove check_huge_shmem() X-Mailer: aerc 0.22.0 References: <20260921-fix_split-v7-0-d25ec991159f@arm.com> <20260921-fix_split-v7-3-d25ec991159f@arm.com> In-Reply-To: <20260921-fix_split-v7-3-d25ec991159f@arm.com> X-ClientProxiedBy: BL1PR13CA0080.namprd13.prod.outlook.com (2603:10b6:208:2b8::25) To IA0PR12MB8374.namprd12.prod.outlook.com (2603:10b6:208:40e::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA0PR12MB8374:EE_|CY8PR12MB7340:EE_ X-MS-Office365-Filtering-Correlation-Id: 7bfe70b3-365e-4ac6-2008-08df1849474f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon Sep 21, 2026 at 6:40 AM EDT, Yeoreum Yun wrote: > check_huge_shmem() was required to distinguish shmem huge pages because > /proc/self/smaps reports them using a dedicated =E2=80=9CShmemPmdMapped= =E2=80=9D entry, > as opposed to =E2=80=9CFilePmdMapped=E2=80=9D for file-backed huge pages. > > Now that /proc/self/smaps is no longer used to detect huge pages and > /proc/kpageflags is used instead, it is sufficient to distinguish > between file-backed and anonymous pages since the ShmemPmdMapped is also > kind of file-backed. > > Therefore, remove check_huge_shmem() and use check_huge_file() instead > and cleanup khugepaged's check_huge operation in mem_ops. > > Suggested-by: David Hildenbrand (Arm) > Signed-off-by: Yeoreum Yun > --- > tools/testing/selftests/mm/folio_split_race_test.c | 2 +- > tools/testing/selftests/mm/khugepaged.c | 38 ++++------------= ------ > tools/testing/selftests/mm/uffd-common.c | 4 +-- > tools/testing/selftests/mm/vm_util.c | 5 --- > tools/testing/selftests/mm/vm_util.h | 1 - > 5 files changed, 9 insertions(+), 41 deletions(-) > Makes sense. Acked-by: Zi Yan --=20 Best Regards, Yan, Zi