Re: [PATCH 17/23] hugetlb/userfaultfd: Handle UFFDIO_WRITEPROTECT

[Mike Kravetz]

On 3/22/21 5:49 PM, Peter Xu wrote:
> This starts from passing cp_flags into hugetlb_change_protection() so hugetlb
> will be able to handle MM_CP_UFFD_WP[_RESOLVE] requests.
> 
> huge_pte_clear_uffd_wp() is introduced to handle the case where the
> UFFDIO_WRITEPROTECT is requested upon migrating huge page entries.
> 
> Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
> ---
>  include/asm-generic/hugetlb.h |  5 +++++
>  include/linux/hugetlb.h       |  6 ++++--
>  mm/hugetlb.c                  | 13 ++++++++++++-
>  mm/mprotect.c                 |  3 ++-
>  mm/userfaultfd.c              |  8 ++++++++
>  5 files changed, 31 insertions(+), 4 deletions(-)

Thanks,

Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>

-- 
Mike Kravetz