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[PATCH v3 2/7] mm/page_owner: add MR_NEVER to enum migrate_reason and use it for last_migrate_reason Cc: "Matthew Brost" , "Joshua Hahn" , "Rakie Kim" , "Byungchul Park" , "Gregory Price" , "Ying Huang" , "Alistair Popple" , "Mathieu Desnoyers" , "Suren Baghdasaryan" , "Michal Hocko" , "Brendan Jackman" , "Johannes Weiner" , , , To: "Ye Liu" , "Andrew Morton" , "David Hildenbrand" , "Steven Rostedt" , "Masami Hiramatsu" , "Vlastimil Babka" From: "Zi Yan" X-Mailer: aerc 0.21.0 References: <20260630015331.147174-1-ye.liu@linux.dev> <20260630015331.147174-3-ye.liu@linux.dev> In-Reply-To: <20260630015331.147174-3-ye.liu@linux.dev> X-ClientProxiedBy: YQZPR01CA0191.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:c01:8b::19) To IA0PR12MB8374.namprd12.prod.outlook.com (2603:10b6:208:40e::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA0PR12MB8374:EE_|DM4PR12MB5722:EE_ X-MS-Office365-Filtering-Correlation-Id: 7aff0181-ca60-4986-027b-08ded64b2113 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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 Jun 29, 2026 at 9:53 PM EDT, Ye Liu wrote: > The last_migrate_reason field uses -1 as a sentinel value to mean "no > migration has happened". Replace the four bare -1 occurrences by > adding a proper MR_NEVER member to enum migrate_reason, defining a > corresponding "never_migrated" string in the MIGRATE_REASON trace > macro, and removing the local MIGRATE_REASON_NONE define. > > No functional change. > > Signed-off-by: Ye Liu > --- > include/linux/migrate_mode.h | 1 + > include/trace/events/migrate.h | 3 ++- > mm/page_owner.c | 8 ++++---- > 3 files changed, 7 insertions(+), 5 deletions(-) > LGTM. Thanks. Reviewed-by: Zi Yan --=20 Best Regards, Yan, Zi