The RFC series reverted all patches where i_mmap_rwsem was used for pmd sharing synchronization, and then added code to use hinode_rwsem. This series ends up with the same code in the end, but is structured as follows: - Revert the page fault/truncation race patch which depends on i_mmap_rwsem always being taken in page fault path. - Add hinode_rwsem to hugetlbfs specific inode and supporting routines. - Convert code from using i_mmap_rwsem for pmd sharing synchronization to using hinode_rwsem. - Add code to more robustly deal with page fault/truncation races. My hope is that this will be easier to review. Mike Kravetz (4): Revert hugetlbfs: Use i_mmap_rwsem to address page fault/truncate race hugetlbfs: add hinode_rwsem to hugetlb specific inode hugetlbfs: use hinode_rwsem for pmd sharing synchronization huegtlbfs: handle page fault/truncate races fs/hugetlbfs/inode.c | 105 +++++++++------- include/linux/fs.h | 15 --- include/linux/hugetlb.h | 129 ++++++++++++++++++-- mm/hugetlb.c | 262 ++++++++++++++++------------------------ mm/memory-failure.c | 34 ++---- mm/memory.c | 5 + mm/migrate.c | 34 +++--- mm/rmap.c | 21 ++-- mm/userfaultfd.c | 17 ++- 9 files changed, 334 insertions(+), 288 deletions(-) -- 2.28.0
