memory ballooning driver
viomb* at virtio?
driver supports the virtio-compliant
memory ballooning device.
Memory ballooning works as follows:
- The host operator requests a
guest to return some amount of memory to the host (via, for example, the
QEMU monitor balloon command).
- The hypervisor sends the
request via the VirtIO memory ballooning device.
- The guest
viomb driver requests allocation of that
amount of physical memory from the OpenBSD memory
viomb device tells the hypervisor the guest
physical memory address of the allocated memory via the VirtIO memory
Rusty Russell, IBM
Corporation, Virtio PCI Card Specification,
device driver first appeared in