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Re: [PATCH v1 2/3] mm/memory_hotplug: initialize memmap of !ZONE_DEVICE with PageOffline() instead of PageReserved()
- To: David Hildenbrand <david@xxxxxxxxxx>
- From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 11 Jun 2024 12:36:11 -0700
- Cc: linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, kasan-dev@xxxxxxxxxxxxxxxx, Mike Rapoport <rppt@xxxxxxxxxx>, Oscar Salvador <osalvador@xxxxxxx>, "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>, Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>, Wei Liu <wei.liu@xxxxxxxxxx>, Dexuan Cui <decui@xxxxxxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Jason Wang <jasowang@xxxxxxxxxx>, Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>, Eugenio Pérez <eperezma@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>, Alexander Potapenko <glider@xxxxxxxxxx>, Marco Elver <elver@xxxxxxxxxx>, Dmitry Vyukov <dvyukov@xxxxxxxxxx>
- Delivery-date: Tue, 11 Jun 2024 19:36:18 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Tue, 11 Jun 2024 11:42:56 +0200 David Hildenbrand <david@xxxxxxxxxx> wrote:
> > We'll leave the ZONE_DEVICE case alone for now.
> >
>
> @Andrew, can we add here:
>
> "Note that self-hosted vmemmap pages will no longer be marked as
> reserved. This matches ordinary vmemmap pages allocated from the buddy
> during memory hotplug. Now, really only vmemmap pages allocated from
> memblock during early boot will be marked reserved. Existing
> PageReserved() checks seem to be handling all relevant cases correctly
> even after this change."
Done, thanks.
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