Re: [PATCH v3 0/6] support batched checking of the young flag for MGLRU

[Baolin Wang]

On 3/7/26 7:20 AM, Andrew Morton wrote:
> On Fri,  6 Mar 2026 14:43:36 +0800 Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx> wrote:
>
> > This is a follow-up to the previous work [1], to support batched checking
> > of the young flag for MGLRU.
> >
> > Similarly, batched checking of young flag for large folios can improve
> > performance during large-folio reclamation when MGLRU is enabled. I
> > observed noticeable performance improvements (see patch 5) on an Arm64
> > machine that supports contiguous PTEs. All mm-selftests are passed.
>
> Thanks, I updated mm-new with this.
>
> > Changes from v2:
> > v2: https://lore.kernel.org/all/cover.1772185080.git.baolin.wang@xxxxxxxxxxxxxxxxx/
> >   - Update the commit message of patch 5 (per David).
> >   - Fix some coding style issues (per David).
> >   - Remove 'cur_pte' variable in lru_gen_look_around() (per David).
> >   - Move 'ptes += nr;' to the suitable place in folio_referenced_one() (per David).
> >   - Add acked tag from David. Thanks.
>
> Here's how v3 altered mm.git:

Thanks Andrew. LGTM.