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99a4706a |
| 22-Oct-2023 |
Maciej S. Szmigiero <maciej.szmigiero@oracle.com> |
Add Hyper-V Dynamic Memory Protocol driver (hv-balloon) hot-add support
One of advantages of using this protocol over ACPI-based PC DIMM hotplug is that it allows hot-adding memory in much smaller g
Add Hyper-V Dynamic Memory Protocol driver (hv-balloon) hot-add support
One of advantages of using this protocol over ACPI-based PC DIMM hotplug is that it allows hot-adding memory in much smaller granularity because the ACPI DIMM slot limit does not apply.
In order to enable this functionality a new memory backend needs to be created and provided to the driver via the "memdev" parameter.
This can be achieved by, for example, adding "-object memory-backend-ram,id=mem1,size=32G" to the QEMU command line and then instantiating the driver with "memdev=mem1" parameter.
The device will try to use multiple memslots to cover the memory backend in order to reduce the size of metadata for the not-yet-hot-added part of the memory backend.
Co-developed-by: David Hildenbrand <david@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
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