[RFC] mm: Multi-gen LRU: fix use of mm/page_idle/bitmap

["黄靖(黄靖)" <henry.hj@antgroup.com>]

When Multi-Gen LRU is enabled, we can't use /sys/kernel/mm/page_idle/bitmap
to track memory which is actually been used.
Unfortunately we didn't find anyone report this problem, or it just
by design ?
Detail information, how-to-reproduct and our way to fix are written in our
fix patch.

Henry Huang (1):
  mm: Multi-Gen LRU: fix use mm/page_idle/bitmap

 mm/swap.c   |  3 +++
 mm/vmscan.c | 37 ++++++++++++++++++++++++++-----------
 2 files changed, 29 insertions(+), 11 deletions(-)

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2.43.0