VIOIF(4) BSD Kernel Interfaces Manual VIOIF(4)NAME
vioif -- VirtIO NIC driver
SYNOPSIS
virtio* at pci? dev ? function ?
vioif* at virtio?
DESCRIPTION virtio(4) defines an interface for efficient, standard, and extensible I/O between the hypervisor and the virtual machine. The vioif driver
supports virtio-compliant virtual network interface cards.
SEE ALSO netintro(4), virtio(4), ifconfig(8)
Rusty Russell, IBM Corporation, Virtio PCI Card Specification, http://ozlabs.org/~rusty/virtio-spec/.
HISTORY
The vioif device driver appeared in NetBSD 6.0.
BUGS
No offloading support.
BSD November 26, 2011 BSD
Check Out this Related Man Page
VIOMB(4) BSD Kernel Interfaces Manual VIOMB(4)NAME
viomb -- VirtIO memory ballooning driver
SYNOPSIS
virtio* at pci? dev ? function ?
viomb* at virtio?
DESCRIPTION virtio(4) defines an interface for efficient, standard, and extensible I/O between the hypervisor and the virtual machine. 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 e.g. Qemu monitor balloon command).
2. The hypervisor sends the request via VirtIO memory ballooning device.
3. The guest viomb driver requests allocation of that amount of physical memory from the NetBSD memory management system.
4. The viomb device tells the hypervisor the guest physical memory address of the allocated memory via VirtIO memory ballooning device.
The sysctl node hw.viomb.npages shows the requested number of memory pages to return to the hypervisor, while hw.viomb.actual shows the
actual number of memory pages that are already returned to the hypervisor.
SEE ALSO virtio(4), sysctl(8)
Rusty Russell, IBM Corporation, Virtio PCI Card Specification, http://ozlabs.org/~rusty/virtio-spec/.
HISTORY
The viomb device driver appeared in NetBSD 6.0.
BUGS
The userland interface should be same as the Xen ballooning device.
BSD November 26, 2011 BSD
Introduction
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