Currently dax_mapping_entry_mkclean() fails to clean and write protect the pmd_t of a DAX PMD entry during an *sync operation. This can result in data loss, as detailed in patch 4. You can find a working tree here: https://git.kernel.org/cgit/linux/kernel/git/zwisler/linux.git/log/?h=dax_pmd_clean_v2 This series applies cleanly to mmotm-2016-12-19-16-31. Changes since v1: - Included Dan's patch to kill DAX support for UML. - Instead of wrapping the DAX PMD code in dax_mapping_entry_mkclean() in an #ifdef, we now create a stub for pmdp_huge_clear_flush() for the case when CONFIG_TRANSPARENT_HUGEPAGE isn't defined. (Dan & Jan) Dan Williams (1): dax: kill uml support Ross Zwisler (3): dax: add stub for pmdp_huge_clear_flush() mm: add follow_pte_pmd() dax: wrprotect pmd_t in dax_mapping_entry_mkclean fs/Kconfig | 2 +- fs/dax.c | 49 ++++++++++++++++++++++++++++++------------- include/asm-generic/pgtable.h | 10 +++++++++ include/linux/mm.h | 4 ++-- mm/memory.c | 41 ++++++++++++++++++++++++++++-------- 5 files changed, 79 insertions(+), 27 deletions(-) -- 2.7.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>