Re: [PATCH 3/3] mm/swap: remove unneeded swap_active_head

[Chris Li <chrisl@kernel.org>]

Hi Baoquan,

On Thu, Oct 9, 2025 at 12:47 AM Baoquan He <bhe@redhat.com> wrote:
>
> By the way, Chris worried the plist swap_active_head could be reused by
> the ongoing swap-tier work and suggested to hold off this patchset till
> swap-tier work is clear. Now seems it won't impact swap-tier, I will
> send a v2 against mm-new.

Sorry I haven't made it clear earlier. I withdraw the NACK because
that is my misunderstanding of the code behavior. It does not mean I
clear the swap tiers will not use swap_active_head yet, I actually
haven't done that investigation.

I still suggest deferring this series which deletes the
"swap_active_head". Wait until YoungPark's swap tiers to be sent out
on the list. Let's wait for about 1 month or so, we should have a much
better understanding if the swap tiers series needs to use the
"swap_active_head". We are not in a hurry to remove it, right? The
earliest this can go into the official tree is 6.19 anyway. We still
have some time.

YoungPark, do you know if you want to use "swap_active_head" in your
pending patch series? Even better send your pending RFC patches to the
list and Baoquan can collaborate on it.

Chris