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

[Chris Li <chrisl@kernel.org>]

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.

Chris