[PATCH v2 0/3] Fix cache flush issues considering PMD sharing

[Baolin Wang]

Hi,

This patch set fixes some cache flushing issues if PMD sharing is
possible for hugetlb pages, which were found by code inspection.
Meanwhile Mike found the flush_cache_page() can not cover the whole
size of a hugetlb page on some architectures [1], so I added a new
patch 3 to fix this issue, since I found only try_to_unmap_one()
and try_to_migrate_one() need to fix after some investigation.

Please help to review. Thanks.

[1] https://lore.kernel.org/linux-mm/064da3bb-5b4b-7332-a722-c5a541128705@xxxxxxxxxx/

Changes from v1:
 - Add reviewed-by tag from Mike.
 - Update some comments suggested by Mike.
 - Add a new patch to fix cache issue for hugetlb page.

Baolin Wang (3):
  mm: hugetlb: Considering PMD sharing when flushing cache/TLBs
  mm: rmap: Move the cache flushing to the correct place for hugetlb PMD
    sharing
  mm: rmap: Use flush_cache_range() to flush cache for hugetlb pages

 mm/hugetlb.c |  17 ++++++++-
 mm/mremap.c  |   2 +-
 mm/rmap.c    | 118 ++++++++++++++++++++++++++++++++---------------------------
 3 files changed, 80 insertions(+), 57 deletions(-)

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1.8.3.1