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| author | Ye Liu <ye.liu@linux.dev> | 2026-07-01 14:10:45 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-07-02 23:26:51 -0700 |
| commit | eddcdb2c8168424e7903251896e3f2813154d877 (patch) | |
| tree | 0678cc9d597410a8aeab8f8122b853a047688e66 /include | |
| parent | 5b6dd40bd434760eb3481a52d7bd7f7d595720ab (diff) | |
| download | linux-next-eddcdb2c8168424e7903251896e3f2813154d877.tar.gz linux-next-eddcdb2c8168424e7903251896e3f2813154d877.zip | |
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/20260701061101.344679-3-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: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/migrate_mode.h | 1 | ||||
| -rw-r--r-- | include/trace/events/migrate.h | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/migrate_mode.h b/include/linux/migrate_mode.h index 265c4328b36a..05102d4d2490 100644 --- a/include/linux/migrate_mode.h +++ b/include/linux/migrate_mode.h @@ -25,6 +25,7 @@ enum migrate_reason { MR_LONGTERM_PIN, MR_DEMOTION, MR_DAMON, + MR_NEVER, /* page has never been migrated */ MR_TYPES }; 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 |