Re: [Xen-devel] [PATCH v2 fixed 13/16] numa: Teach ram block notifiers about resizable ram blocks

[Paul Durrant <pdurrant@xxxxxxxxx>]

On Wed, 12 Feb 2020 at 14:44, David Hildenbrand <david@xxxxxxxxxx> wrote:
>
> We want to actually resize ram blocks (make everything between
> used_length and max_length inaccessible) - however, not all ram block
> notifiers will support that. Let's teach the notifier that ram blocks
> are indeed resizable, but keep using max_size in the existing notifiers.
>
> Supply the max_size when adding and removing ram blocks. Also, notify on
> resizes. Introduce a way to detect if any registered notifier does not
> support resizes - ram_block_notifiers_support_resize() - which we can later
> use to fallback to legacy handling if a registered notifier (esp., SEV and
> HAX) does not support actual resizes.
>
> Cc: Richard Henderson <rth@xxxxxxxxxxx>
> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> Cc: "Dr. David Alan Gilbert" <dgilbert@xxxxxxxxxx>
> Cc: Eduardo Habkost <ehabkost@xxxxxxxxxx>
> Cc: Marcel Apfelbaum <marcel.apfelbaum@xxxxxxxxx>
> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Cc: Anthony Perard <anthony.perard@xxxxxxxxxx>
> Cc: Paul Durrant <paul@xxxxxxx>
> Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
> Cc: Igor Mammedov <imammedo@xxxxxxxxxx>
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>

Xen parts...

Acked-by: Paul Durrant <paul@xxxxxxx>

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