Re: [PATCH v3 2/7] mm/page_owner: add MR_NEVER to enum migrate_reason and use it for last_migrate_reason

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 <redacted>
---
 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 <ziy@nvidia.com>


-- 
Best Regards,
Yan, Zi