Re: [RFC PATCH v2 0/5] mm/swap, memcg: Introduce swap tiers for cgroup based swap control

YoungJun Park
2026-02-13T02:26:27Z

On Thu, Feb 12, 2026 at 01:22:04AM -0800, Chris Li wrote:
> On Wed, Feb 11, 2026 at 10:12 PM Chris Li <chrisl@kernel.org> wrote:
> >
> > Hi Youngjun,
> >
> > On Sun, Jan 25, 2026 at 10:53 PM Youngjun Park <youngjun.park@lge.com> wrote:
> > >
> > > This is the second version of the RFC for the "Swap Tiers" concept.
> > > Link to v1: https://lore.kernel.org/linux-mm/20251109124947.1101520-1-youngjun.park@lge.com/
> > >
> > > This version incorporates feedback received during LPC 2025 and addresses
> > > comments from the previous review. We have also included experimental
> > > results based on usage scenarios intended for our internal platforms.
> >
> > Thanks for the patches series.
> >
> > Sorry for the late reply. I have been wanting to reply to it but get
> > super busy at work.
> >
> > Some high level feedback for the series. Now that you demonstrated the
> > whole series, let's focus on making small mergiable baby steps. Just
> > like the swap table has different phases. Make each step minimal, each
> > step shows some value. Do the MVP, we can always add more features as
> > a follow up step.
> >
> > I suggest the first step is getting the tiers bits defined. Add only,
> > no delete. Get that reviewed and merged, then the next step is to use
> > those tiers.
>
> Just take a quick look at the series. I take that suggestion back.
> This series is actually not too long. Adding the tiers name alone does
> not add any real value. I actually need to look at the whole series
> rather than just the tier name alone.
>
> Chris

Oops, I replied to your previous email before seeing this one.

Stripping out the remove/modify parts is also feasible. Do you agree with
that direction?

Youngjun