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

[Kirill A. Shutemov]

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@xxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>

Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>

-- 
 Kirill A. Shutemov