[PATCH 0/2] don't use mapcount() to check large folio sharing

[Yin Fengwei <fengwei.yin@xxxxxxxxx>]

In madvise_cold_or_pageout_pte_range() and madvise_free_pte_range(),
folio_mapcount() is used to check whether the folio is shared. But it's
not correct as folio_mapcount() returns total mapcount of large folio.

Use folio_estimated_sharers() here as the estimated number is enough.

Yin Fengwei (2):
  madvise: don't use mapcount() against large folio for sharing check
  madvise: don't use mapcount() against large folio for sharing check

 mm/huge_memory.c | 2 +-
 mm/madvise.c     | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

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2.39.2