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...command line options, QMP, etc.). Use the source of this page to populate a new one for the new feature, and then add the info. ..., any tips on helping to narrow down the problems to this subsystem? e.g. A minimal command line that reproduces is always helpful.

* [http://www.linuxplanet.com/linuxplanet/reports/6503/1/ Linux as a hypervisor] at Linux Planet * [[Memory|How KVM deals with memory]] - a look inside how KVM interacts with the Linux VM.

...code is available through a git tree (like the kernel itself). To create a repository using git, type [http://git.kernel.org/?p=virt/kvm/kvm.git;a=summary]

...To share host files w/ the guest, we use 9p over virtio in conjunction w/ a filesystem device exporting the portion of the host filesystem that we'd li ...eate a 9pvirtio device exposing the mount_tag <code>hostshare</code> (just a name to identify the mount point). That device is coupled to an fsdev name

The Mac Pro is a great home server machine - twin quad core Xeons, plenty of memory capabili It would seem that there is a special set of registers on Intel processors called the MSR (manufacturs sp

If you are interested in organizing such a group time event, please add * Inflation semantics: Should a host be able to target free pages specifically?

...back. Naturally, a 64-bit guest can only be migrated to a 64-bit host, but a 32-bit guest can be migrated at will. ...s NX-supporting hosts. To disable NX for a given guest, start it with such a parameter: -cpu qemu64,-nx

CPU hotplug is a controverse feature. It exists on qemu-kvm for it should involve a windows-specific driver (to be written)

...rvisor part, especially how to unplug, re-plug the SR-IOV device still has a lot of open questions. ...are two ways of orchestrating datapath switching in case of (for example) a migration.

...San Diego, CA, August 29-31. The Virtualization Micro Conference included a number of presentations relevant for KVM.

...development project from 2013 that was never completed. It is left here as a historical record. The feature described does not exist in any currently sh ...size is greater than what the host has physically available. For example, a 2G host running two VMs each with 2G would be over-committed.

* [[NetConsole| set up a network console]] * [[HowToConfigScript|Configuration Script for KVM]] - a complete management utility, configuration file format, and init script.

If you are interested in organizing such a group time event, please add '''Summary:''' Doing a better job of mitigating speculative-execution-based attacks

** When the installer asks you to select a drive, load the virtio driver (viostor) The solution is to reinstall the MBR. Here is a tutorial for doing this: http://www.sevenforums.com/tutorials/20864-mbr-res

...lease see [http://git.kernel.org/?p=virt/kvm/kvm-guest-drivers-windows.git;a=blob_plain;f=vioserial/app/device.cpp;hb=48b3a3f78fe4711d1561b32c9a1c0ca647 * Only one open allowed at a time for a port.

You'll see a normal SDL window pop up, and if you poke inside the guest you'll find that ...use SPICE. We need to enable the spice server in qemu-kvm. We also need a client to view the guest. So first be sure the client is installed:

...Since iperf is a SW packet generator and normal process shall it be, this a reasonable number. === Assign the VF to a guest ===

* The idea behind it is to have a common framework for hypervisors for IO virtualization

* '''Insufficient PCI window size'''<br>This is a fixable SeaBIOS limitation. Patches are currently under development by [htt ...ers are known to be affected by this, but probably only during early boot. A workaround could be identity mapping, i.e. locating the memory BARs in the

KSM is a memory-saving de-duplication feature, that merges anonymous (private) pages |how many pages changing too fast to be placed in a tree

...can either add these to your distro's module list to load on boot, or run a command like this. The QEMU monitor has a new command, '''pci_add''', which is used to hotadd the pci devices.

The vmglext module for Xorg is not compiled, but comes as a 32-bit binary in the download. This will not work for 64-bit unless you pa ...'''make''' and '''make install-guest'''. Requires sudo to install (if in a system path) and to change ldconfig to look for VMGL loadable modules.

...written a utility called '''kvmctl''' to manage KVM-based VMs, along with a configuration file format, and other associated utilities. Feel free to us A couple of assumptions are made for this work:

Save the following as a .reg file and you can apply the changes by running the file on windows. The wsh tag is a legacy option and no longer has any effect. The default setting for forcews

This is a template page used to help documenting the features and supply the full inf

* In order to assign devices in KVM, you'll need a system which supports VT-d, not to be confused with the VT-x support of you ...there has been some success passing through a secondary Radeon HD 5850 as a VM's secondary display.

* Experience in Developing a Driver for a Complex New Hardware Device on Qemu/KVM - Knut Omang ([https://www.youtube. ...ayer Primitives - Kashyap Chamarthy ([http://www.linux-kvm.org/images/8/85/A-Practical-Look-at-QEMU-Block-Layer-Primitives.pdf slides])

* You want a simple way for your virtual machine to access to the host, to the internet * You are ready to take a huge performance hit.

* Add a read-only memory type. ...rop large ptes when write protecting; just write protect them. When taking a write fault, either drop the large pte, or convert it to small ptes and wri

* Painting a Picture of the KVM Use-cases in the Container World - Fabian Deutsch, Red H * Contributor Q&A Panel - Moderated by Stefan Hajnoczi, Red Hat ([https://www.youtube.com/wat

Intel 82801AA '''AC97''' emulation works with Windows 7, but is detected as a "Multimedia Audio Controller" device. The correct driver can be installed t

...increasing the throughput (HT), increase the network availability (HA) or a combination of both. ...west). Even if a NIC supports jumbo frames, it may not always work well in a bond together with jumbo frames.

The kernel modules can be found in kvm-kmod-<kernel version>. A kernel version of 2.6.32.3 means that these are the ''same'' modules as tho If you use a kernel from http://www.kernel.org or one provided from your distribution an

Qemu provides a way to change the iso in the virtual cdrom device via the monitor interface In case you already have a cdrom in the drive you need to '''eject''' the current iso first before iss

kvm-unit-tests is a project as old as KVM. As its name suggests, it's purpose is to provide [h ...M-unit-tests#Adding a test|"Adding a test"]] provides an example of adding a test. Finally, section [[KVM-unit-tests#Contributing|"Contributing"]] expla

* Using multiple threaded vhost to serve as the backend of a multiqueue capable virtio-net adapter * Use a multi-queue awared virtio-net driver to send and receive packets to/from ea

There are a several options available to manage kvm virtual machines: |Abiquo is a technology-agnostic solution for enterprises and service providers who want

...the real mode emulation, which happens in early stage of boot. If there's a failure as soon as the VM starts, it's most likely due to the real mode.

...edia:2012-forum-live-migration.pdf | Live Migration: Even faster, Now With a Dedicated Thread!]] || Orit Wasserman, Red Hat |4:30pm || [[Media:2012-forum-Q35.pdf | A New Chipset for Qemu - Intel's Q35]] || Jason Baron, Red Hat || [[Media:201

The source for the Windows drivers is hosted in a repository on GIT hub. Anonymous users can clone the repository

If you are running a server without X, access your VM through VNC

...ions, or an AMD processor with SVM extensions (also called AMD-V). Xen has a [http://wiki.xensource.com/xenwiki/HVM_Compatible_Processors complete list] See also '''Can KVM run a 32-bit guest on a 64-bit host? What about PAE?''' below.

Virtualization enables multiple operating systems to run on a system, manage virtual machines, one part of which is a virtual CPU (or vcpu).

...mainly for development, user queries are welcome. No need to subscribe for a one-off question, just send an email. You may also want to check the variou

...w.youtube.com/watch?v=j0bp4fnO98w video] [https://www.linux-kvm.org/images/a/a1/To_EL2_and_Beyond_0.pdf slides]) * Adding Device Direct Assignment Support for a New Bus Infrastructure on ARM64: Challenges and Performance Tuning - Mihai

...| [[Media:01x07a-Vhost.pdf | vhost-scsi Technical Discussion]] || Nicholas A. Bellinger, Datera |3:30pm || [[Media:01x08b-KVMGT-a.pdf |KvmGT: A Full GPU Virtualization Solution for KVM]] || Jike Song, Intel || [[Media:0

* Svirt - sVirt is a community effort aimed at integrating Mandatory Access Control (MAC) securi

...more]] || Rik van Riel || [[Media:KVM-Forum-2011-RT-KVM.pdf | Using KVM as a Real-Time Hypervisor]] || Jan Kiszka |15:50 - 16:20 || [[Media:2011-forum-keep-a-limit-on-it-io-throttling-in-qemu.pdf | IO Throttling in QEMU]] || Ryan Har

Jason's idea: introduce a flag to tell pktgen not for wait MST's idea: add a .ndo_tx_polling not only for pktgen

| [[Media:Kvm10_ganeti_talk.pdf | Ganeti as a KVM cluster management interface ]] || Guido Trotter || [http://vimeo.com/ | [[Media:2010-forum-mtosatti_walkthrough_entry_exit.pdf | A Walkthrough on some recent KVM performance improvements ]] || Marcelo Tosat

...13-crossing-the-endianness-bridge.pdf | Crossing the Endianness Bridge (Or a Foolish Attempt at Mixed-Endian Virtualization)]] || Marc Zyngier, ARM || [ ...Fault Tolerance]] || Michael Hines, IBM || Implementing New Block Drivers: A QEMU Developer Primer || Jeff Cody, Red Hat || [[Media:Kvm-forum-2013-libvi

| [[Media:KvmForum2008$kdf2008_4.pdf | Buiding a better Userspace - The current and future state of QEMU and KVM integration

| [[Media:KvmForum2007$kvm_iommu_talk.pdf| A KVM friendly IOMMU API for Linux]]

...OS 6.4 x64. Virtio drivers are installed in the guest os. Host machine has a Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz and 8GB RAM. The guest uses 4GB RAM ...read-exception-not-handled?forum=WinPreview2014Setup . Running a host with a I7 820 QM, Core2Duo vurtual CPU works, with 1 socket, 2 core and 1 thread a

* LSO, a.k.a. GSO, a.k.a. TSO – Large, Global, Transmit segment offload – the same thing in cont For send operation scatter-gather mode is a default, it can be disabled by configuration to force copy mode to prealloc

* use a bitmap for tracking used interrupts (Alex Williamson) * vmx unrestricted guest (Nitin A Kamble)