Re: [PATCH 1/3] mm, page_owner: record page owner for each subpage

[Kirill A. Shutemov]

On Mon, Aug 19, 2019 at 11:55:51AM +0000, Kirill A. Shutemov wrote:
> > @@ -2533,6 +2534,8 @@ static void __split_huge_page(struct page *page, 
> > struct list_head *list,
> >  
> >     remap_page(head);
> >  
> > +   split_page_owner(head, HPAGE_PMD_ORDER);
> > +
> 
> I think it has to be before remap_page(). This way nobody would be able to
> mess with the page until it has valid page_owner.

Or rather next to ClearPageCompound().

-- 
 Kirill A. Shutemov