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
