diff options
| author | Ye Liu <ye.liu@linux.dev> | 2026-07-14 09:51:01 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-07-28 21:11:50 -0700 |
| commit | 7eeed888c99a0619911165030bf3f82b265c141a (patch) | |
| tree | 4bfd82fcf5a104df4620455891dec871e9ed95f8 /include/trace | |
| parent | 53472eb262913d144df89ea959fcc30e43001f79 (diff) | |
mm/page_owner: add MR_NEVER to enum migrate_reason and use it for last_migrate_reason
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 updating
the GDB page_owner script to use MR_NEVER instead of the hardcoded -1 so
that lx-dump-page-owner does not incorrectly report unmigrated pages as
migrated.
No functional change.
Link: https://lore.kernel.org/20260714015117.78351-3-ye.liu@linux.dev
Signed-off-by: Ye Liu <ye.liu@linux.dev>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: David Hildenbrand (Arm) <david@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/migrate.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/trace/events/migrate.h b/include/trace/events/migrate.h index cd01dd7b3640..11bc0aa14c7e 100644 --- a/include/trace/events/migrate.h +++ b/include/trace/events/migrate.h @@ -23,7 +23,8 @@ EM( MR_CONTIG_RANGE, "contig_range") \ EM( MR_LONGTERM_PIN, "longterm_pin") \ EM( MR_DEMOTION, "demotion") \ - EMe(MR_DAMON, "damon") + EM( MR_DAMON, "damon") \ + EMe(MR_NEVER, "never_migrated") /* * First define the enums in the above macros to be exported to userspace |