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Command: viomb | Section: 4 | Source: OpenBSD | File: viomb.4
VIOMB(4) FreeBSD Kernel Interfaces Manual VIOMB(4)
NAME
viomb - VirtIO memory ballooning driver
SYNOPSIS
viomb* at virtio?
DESCRIPTION
The viomb driver supports the virtio-compliant memory ballooning device.
Memory ballooning works as follows:
1. The host operator requests a guest to return some amount of memory
to the host (via, for example, the QEMU monitor balloon command).
2. The hypervisor sends the request via the VirtIO memory ballooning
device.
3. The guest viomb driver requests allocation of that amount of
physical memory from the OpenBSD memory management system.
4. The viomb device tells the hypervisor the guest physical memory
address of the allocated memory via the VirtIO memory ballooning
device.
SEE ALSO
intro(4), virtio(4)
Rusty Russell, IBM Corporation, Virtio PCI Card Specification,
http://ozlabs.org/~rusty/virtio-spec/.
HISTORY
The viomb device driver first appeared in OpenBSD 5.3.
FreeBSD 14.1-RELEASE-p8 January 16, 2013 FreeBSD 14.1-RELEASE-p8