Re: [PATCH] mm: Track page table modifications in __apply_to_page_range() construction

[Joerg Roedel]

On Fri, Aug 21, 2020 at 12:38:03PM +0100, Chris Wilson wrote:
> In the version I tested, I also had
> 
> @@ -2216,7 +2216,7 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
> 
>         if (create) {
>                 pte = (mm == &init_mm) ?
> -                       pte_alloc_kernel(pmd, addr) :
> +                       pte_alloc_kernel_track(pmd, addr, mask) :
>                         pte_alloc_map_lock(mm, pmd, addr, &ptl);
>                 if (!pte)
>                         return -ENOMEM;
> 
> And that PGTBL_PMD_MODIFIED makes a difference.

Right, thanks. Added that too.