Re: [PATCH v4] mm/vmscan: fix demotion targets checks in reclaim/demotion

[Bing Jiao]

On Sun, Jan 04, 2026 at 10:27:45AM -0800, Andrew Morton wrote:
> We'll want to fix these things in 6.16.X and later, but you've prepared
> this patch against "mm/vmscan: don't demote if there is not enough free
> memory in the lower memory tier", which is presently under test/review
> in mm.git's mm-unstable branch.
>
> This seems to be incorrect ordering - this fix should go ahead of
> Akinobu Mita's series "mm: fix oom-killer not being invoked when
> demotion is enabled v2".
>
> So can you please redo this patch against current mainline?  And please
> also review the "mm: fix oom-killer not being invoked when demotion is
> enabled" series to ensure that things will work together nicely when
> that time comes.

Hi Andrew,

Thank you for the detailed explanation. Patch v4 has been sent.

V4 is patched against the mainline. Tested on both the mainline and
mm-everything (after Akinobu Mita's series "mm: fix oom-killer not
being invoked when demotion is enabled v2"), and passed.

Best,
Bing