Re: [PATCH v4 00/16] Remove PG_private by using page/folio->private checks instead

[Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>]

On Sun, 13 Sep 2026 22:23:58 -0400 Zi Yan <ziy@xxxxxxxxxx> wrote:

> This patchset removes PG_private to make space for upcoming PG_folio for
> identifying pages from a folio (more details in Note below). Instead of
> checking PG_private, all code is changed to check page/folio->private !=
> NULL instead.
> 
> MM people are cc'd on all patches and subsystem people are cc'd on the
> cover letter and corresponding patches.
> 
> Patch 6 is picked up separately in f2fs tree, but since mm-new does not
> have it yet, it is sent for MM testing.

AI review claims to have found a pre-existing critical level deadlock
in f2fs:

        
https://sashiko.dev/#/patchset/20260913-remove-pg_private-v4-0-848550f7574e@xxxxxxxxxx

it also had a few things to say about this patchset and, as always,
hugetlb.c.


Thanks, The MM bits appear adequately reviewed and review of the non-MM
bits are, as usual:

  Great to have but I won't permit lack of other-than-MM review to
  block MM improvements.

So I'll queue it all up and shall push it into -next after a few days.

Acks from non-MM maintainers are appreciated.

If a non-MM patch appears in linux-next I'll autodrop the mm.git copy
of that patch.