Re: [PATCH] mm: vmscan: fix dirty folios throttling on cgroup v1 for MGLRU

[Baolin Wang]

On 4/2/26 11:23 AM, Shakeel Butt wrote:
> On Thu, Apr 02, 2026 at 10:51:37AM +0800, Baolin Wang wrote:
> >
> [...]
> > > > This is v1 only and I don't care much but what is stopping you from moving away
> > > > from v1?
> > >
> > > For example memsw?
> > >
> > > https://lore.kernel.org/linux-mm/q2x4drxpjbxcxgns6bjp446ynsxgl32ckcljqcol7posds4nit@3n3tjq35anvb/
> > >
> > > I remember Jingxiang's plan is to improve the page counter first.
> >
> > Additionally, we still have some existing users on cgroup v1, and they will
> > need some time to migrate to cgroup v2.
>
> Time is fine but is there any specific v1 feature which is a blocker for you.

Nope, I haven’t received any blockers from our customers so far.

> The memsw is a known one and is the same for Google (data center). I am aiming
> to provide memsw like behavior through my memcg_ext proposal but performance is
> an open question. I am aiming to have a prototype before LSFMM to further the
> discussion.

Great.