FWN/Beats/Virtualization

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[http://www.redhat.com/mailman/listinfo/fedora-virt fedora-virt list].
 
[http://www.redhat.com/mailman/listinfo/fedora-virt fedora-virt list].
  
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==== New Release virt-top 1.0.4 ====
+
==== KVM and Paravirtualization ====
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[[RichardJones|Richard Jones]]
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The Linux Kernel-based Virtual Machine is a form of hardware assisted
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announced<ref>http://www.redhat.com/archives/fedora-virt/2009-October/msg00019.html</ref> a new release of {{package|virt-top}}.
+
virtualization<ref>http://en.wikipedia.org/wiki/Hardware-assisted_virtualization</ref>
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"Virt-top<ref>http://et.redhat.com/~rjones/virt-top/</ref> looks and acts
+
as opposed to software-only or paravirtualization. This means the underlying
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like the familiar top(1) command, displays virtual machines, and uses
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hardware must have CPU features like Intel-VT or AMD-V. While common in the
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libvirt so it works with just about every virtualization system out
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last few years, there are still many servers in operation which lack these extensions.
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there. It also has cool features for sysadmins, like you can use it to
+
 
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log stats into a database or spreadsheet."
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[[GiovanniTirloni|Giovanni Tirloni]]
 +
asked<ref>http://www.redhat.com/archives/fedora-virt/2009-October/msg00090.html</ref>
 +
about the state of paravirtualization support in KVM, and
 +
asked about a set of KVM patches<ref>http://people.redhat.com/mingo/kvm-paravirt-patches/</ref>.
 +
 
 +
[[DorLaor|Dor Laor]]
 +
answered<ref>http://www.redhat.com/archives/fedora-virt/2009-October/msg00092.html</ref>
 +
there is no plan to support non-VT hardware with KVM. While Xen is not
 +
supported on Fedora, it is still a paravirtualization for such hardware option under Redhat 5.
 +
 
 +
<references />
 +
 
 +
==== Installing Virtio Drivers in Windows XP Setup ====
 +
[[RichardHughes|Richard Hughes]]
 +
posted<ref>http://www.redhat.com/archives/fedora-virt/2009-October/msg00101.html</ref>
 +
the following directions for installing VirtIO drivers<ref>http://www.linux-kvm.org/page/WindowsGuestDrivers/Download_Drivers</ref> during Windows XP setup.
 +
 
 +
* create a 1.44Mb image file
 +
* mount it by loopback
 +
* format it with vfat
 +
* copy the {{filename|Install/Xp/x86/viostor.sys}}, {{filename|Install/Xp/x86/wnet.inf}}, and the txtsetup.oem file below to the root of the mounted image
 +
* umount the loop device
 +
* attach the floppy image as a floppy storage element in the VM's details pane
 +
* boot the VM
 +
* remember to press F6 when booting the windows xp setup and select the VirtoIO device.
 +
 
 +
File {{filename|txtsetup.oem}}:
 +
<pre>
 +
[Disks]
 +
d1 = "Viostor SCSI driver disk",\disk1.tag,\
 +
 
 +
[Defaults]
 +
SCSI = viostor
 +
 
 +
[SCSI]
 +
viostor = "Viostor SCSI Controller"
 +
 
 +
[Files.SCSI.viostor]
 +
driver = d1,viostor.sys,viostor
 +
inf = d1,wnet.inf
 +
 
 +
[HardwareIds.scsi.viostor]
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id = "PCI\VEN_1AF4&DEV_1001","viostor"
 +
</pre>
 +
 
 +
Richard added "I'm still unable to install XP using ide, scsi or virtio drivers
 +
as it gives the message "Setup was unable to format the partition. The
 +
disk maybe damaged." -- any ideas welcome."
  
 
<references />
 
<references />
  
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==== Limit VNC Access to a Single Guest ====
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=== Other Sources ===
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Dennis asked<ref>http://www.redhat.com/archives/fedora-virt/2009-October/msg00027.html</ref>
+
−
if it was possible to limit a user to a single guest console rather than the
+
−
all guests in a {{package|virt-manager}} instance.
+
  
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[[RichardJones|Richard Jones]] answered that <code>virt-manager</code> doesn't
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==== Using KSM (Kernel Samepage Merging) with KVM ====
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support that level of authorization<ref>http://fedoraproject.org/wiki/Features/VirtAuthorization</ref> yet, but each guest console can be given<ref>http://www.libvirt.org/formatdomain.html#elementsGraphics</ref> a
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An upcoming feature  of [[Releases/12|Fedora 12]] is
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static VNC port number which can be secured with a firewall or ssh port
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KSM<ref>http://fedoraproject.org/wiki/Features/KSM</ref>.
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forwarding.
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"Kernel SamePage Merging is a recent linux kernel feature which combines
 +
identical memory pages from multiple processes into one copy on write memory
 +
region."
 +
[[HaydnSolomon|Haydn Solomon]] described<ref>http://www.linux-kvm.com/content/using-ksm-kernel-samepage-merging-kvm</ref> how KSM and KVM work together.  
  
 
<references />
 
<references />

Revision as of 05:14, 26 October 2009


Contents

Virtualization

In this section, we cover discussion of Fedora virtualization technologies on the @fedora-virt list.

Contributing Writer: Dale Bewley

Fedora Virtualization List

This section contains the discussion happening on the fedora-virt list.

KVM and Paravirtualization

The Linux Kernel-based Virtual Machine is a form of hardware assisted virtualization[1] as opposed to software-only or paravirtualization. This means the underlying hardware must have CPU features like Intel-VT or AMD-V. While common in the last few years, there are still many servers in operation which lack these extensions.

Giovanni Tirloni asked[2] about the state of paravirtualization support in KVM, and asked about a set of KVM patches[3].

Dor Laor answered[4] there is no plan to support non-VT hardware with KVM. While Xen is not supported on Fedora, it is still a paravirtualization for such hardware option under Redhat 5.

  1. ↑ http://en.wikipedia.org/wiki/Hardware-assisted_virtualization
  2. ↑ http://www.redhat.com/archives/fedora-virt/2009-October/msg00090.html
  3. ↑ http://people.redhat.com/mingo/kvm-paravirt-patches/
  4. ↑ http://www.redhat.com/archives/fedora-virt/2009-October/msg00092.html

Installing Virtio Drivers in Windows XP Setup

Richard Hughes posted[1] the following directions for installing VirtIO drivers[2] during Windows XP setup.

  • create a 1.44Mb image file
  • mount it by loopback
  • format it with vfat
  • copy the Install/Xp/x86/viostor.sys, Install/Xp/x86/wnet.inf, and the txtsetup.oem file below to the root of the mounted image
  • umount the loop device
  • attach the floppy image as a floppy storage element in the VM's details pane
  • boot the VM
  • remember to press F6 when booting the windows xp setup and select the VirtoIO device.

File txtsetup.oem: 

[Disks]
d1 = "Viostor SCSI driver disk",\disk1.tag,\

[Defaults]
SCSI = viostor

[SCSI]
viostor = "Viostor SCSI Controller"

[Files.SCSI.viostor]
driver = d1,viostor.sys,viostor
inf = d1,wnet.inf

[HardwareIds.scsi.viostor]
id = "PCI\VEN_1AF4&DEV_1001","viostor"

Richard added "I'm still unable to install XP using ide, scsi or virtio drivers as it gives the message "Setup was unable to format the partition. The disk maybe damaged." -- any ideas welcome."

  1. ↑ http://www.redhat.com/archives/fedora-virt/2009-October/msg00101.html
  2. ↑ http://www.linux-kvm.org/page/WindowsGuestDrivers/Download_Drivers

Other Sources

Using KSM (Kernel Samepage Merging) with KVM

An upcoming feature of Fedora 12 is KSM[1]. "Kernel SamePage Merging is a recent linux kernel feature which combines identical memory pages from multiple processes into one copy on write memory region." Haydn Solomon described[2] how KSM and KVM work together.

  1. ↑ http://fedoraproject.org/wiki/Features/KSM
  2. ↑ http://www.linux-kvm.com/content/using-ksm-kernel-samepage-merging-kvm
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