Re: [PATCH 11/11] mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk()

Kirill A. Shutemov
2021-06-10T09:43:00Z

On Wed, Jun 09, 2021 at 11:54:46PM -0700, Hugh Dickins wrote:
> Aha! Shouldn't that quick scan over pte_none()s make sure that it holds
> ptlock in the PVMW_SYNC case? That too might have been responsible for
> BUGs or WARNs in split_huge_page_to_list() or its unmap_page(), though
> I've never seen any.
>
> Fixes: ace71a19cec5 ("mm: introduce page_vma_mapped_walk()")
> Signed-off-by: Hugh Dickins <hughd@google.com>
> Cc: <stable@vger.kernel.org>

Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>

--
Kirill A. Shutemov