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

[Chris Li <chrisl@kernel.org>]

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