Re: [PATCH RFC v2] mm: use per_vma lock for MADV_DONTNEED

[Barry Song]

Hi Lorenzo,

On Mon, Jun 2, 2025 at 11:50 PM Lorenzo Stoakes
<lorenzo.stoakes@xxxxxxxxxx> wrote:
>
> Barry - would you mind if I went off and wrote a quick patch to separate
> walk_page_range_novma() into walk_page_range_kernel() and
> walk_page_range_user_novma()?
>
> I realise this is a pain, but I feel strongly that having them together is
> a source of confusion and having us special case a -only used in ptdump-
> case like this is not great.
>
> It wouldn't include any VMA locking stuff from this patch, which you could
> then rebase on that.
>
> I think it'd make sense as a separate series and I can throw that out
> fairly quickly...
>
> But I don't want to step on any toes so just let me know!

Feel free to proceed with the patch. I can rebase on top of your
walk_page_range_kernel() changes.

Thanks
Barry