[PATCH 0/2] add a knob to control whether to use other nodes at the same tier of the target node in DAMON

[wangchuanguo <wangchuanguo@inspur.com>]

In DAMON's migrate_hot and migrate_cold features, the code was
intended to migrate pages ​​only to the node specified by target_nid​​.
However, during testing, it was observed that memory allocation
and migration could occur on ​​any nodes​​, which is a BUG.
The first patch in this PR fix this issue.

A use_nodes_of_tier file has been added under the directory /sys/kernel/mm/damon/admin/kdamonds/<N>/contexts/<N>/schemes/<N>/
to control whether to ​​use other nodes in the same tier as
the target node​​ for migration.

wangchuanguo (2):
  mm: migrate: restore the nmask after successfully allocating on the 
    target node
  mm/damon/sysfs-schemes: add use_nodes_of_tier on sysfs-schemes

 include/linux/damon.h        |  9 ++++++++-
 include/linux/memory-tiers.h |  5 +++++
 mm/damon/core.c              |  6 ++++--
 mm/damon/lru_sort.c          |  3 ++-
 mm/damon/paddr.c             | 19 ++++++++++++-------
 mm/damon/reclaim.c           |  3 ++-
 mm/damon/sysfs-schemes.c     | 31 ++++++++++++++++++++++++++++++-
 mm/memory-tiers.c            | 13 +++++++++++++
 mm/vmscan.c                  |  2 +-
 samples/damon/mtier.c        |  3 ++-
 samples/damon/prcl.c         |  3 ++-
 11 files changed, 81 insertions(+), 16 deletions(-)

-- 
2.39.3