[PATCH 0/3] Fix some issues when looking up hugetlb page

[Baolin Wang]

Hi,

On ARM64 architecture, it can support CONT-PTE/PMD size hugetlb. When
looking up hugetlb page by follow_page(), we will hold the incorrect
pte/pmd lock for the CONT-PTE/PMD size hugetlb page, which will make
the pte/pmd entry unstable even under the lock and cause some potential
race issues. So considering the CONT-PTE/PMD size hugetlb, this patch set
changes to use the correct function to get the correct pte/pmd entry lock
to make the pte/pmd entry stable.

Baolin Wang (3):
  mm/gup: fix races when looking up a CONT-PTE size hugetlb page
  mm/hugetlb: fix races when looking up a CONT-PMD size hugetlb page
  mm/hugetlb: add FOLL_MIGRATION validation before waiting for a
    migration entry

 include/linux/hugetlb.h |  4 ++--
 mm/gup.c                | 24 +++++++++++++++++++++---
 mm/hugetlb.c            | 17 ++++++++++++++---
 3 files changed, 37 insertions(+), 8 deletions(-)

-- 
1.8.3.1