Ye LiuandAndrew Morton 7eeed888c9 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>

2026-07-28 21:11:50 -07:00

..

linux

mm/page_owner: add MR_NEVER to enum migrate_reason and use it for last_migrate_reason

2026-07-28 21:11:50 -07:00

Makefile

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vmlinux-gdb.py

scripts/gdb: add 'lx-kasan_mem_to_shadow' command

2024-09-01 20:43:29 -07:00