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SubjectRe: [PATCH v2 1/4] mm/memory-hotplug: fix lowmem count overflow when offline pages
> Hi KOSAKI,
> Could you please help to give more information on the background
> about why 32bit platforms with highmem can't support memory hot-removal?

It doesn't impossible. Just nobody did. I was playing these code as a
maintainer a while
and I saw all of patches doesn't handle highmem correctly. But I
didn't refuse because
I know it's not a regression.

> We are trying to enable memory hot-removal on some 32bit platforms with
> highmem, really appreciate your help here!

But, if you guys have a strong motivation, it's a very good news. I
have no objection not to mark it broken and accept your contributions.


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