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(New page: = Feature Name = == Summary == Dom0 support for pvops-based {{package|kernel}} to support hosting of Xen guests which has been lacking since Fedora 8. == Owner =...)
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= Feature Name =
== Summary ==
Dom0 support for [[Features/XenPvops | pvops-based]] {{package|kernel}} to support hosting of Xen guests which has been lacking since Fedora 8.
== Owner ==
* Name: None
Previously involved: EduardoHabkost, MarkMcLoughlin, Stephen Tweedie, Chris Wright, Juan Quintela, Markus Armbruster, Glauber Costa, DanielBerrange, ...
== Current status ==
* Last updated: 2009-01-22
* Percentage of completion: 0%
* Targeted release: Unknown
* Fedora 10 shipped 2008-11-25 with Xen i686 and x86_64 DomU support enabled in the stock kernel.
* Dom0 status: awaiting upstream kernel support
* Background:
: [  upstream status], [;a=shortlog;h=xen/dom0/hackery  latest pv_ops dom0 patches]
: [[FWN/Issue158#Test_Dom0_Kernel_For_Fedora_10|FWN #158]],[[FWN/Issue152#Status_of_dom0_Support_in_Upstream_Kernel|FWN #152]], [[FWN/Issue146#No_Dom0_Support_in_Fedora_10|FWN #146]], [[FWN/Issue137#State_of_Xen_in_Upstream_Linux|FWN #137]]
: [ old status #1], [ old status #2]
== Detailed Description ==
See [[Features/XenPvops]]  for a rationale. This feature just continues the paravirt_ops Xen effort to bring it back to feature parity with Fedora 8 Xen.
== Scope ==
Work items:
* Implement Dom0 support in upstream kernel (JeremyFitzhardinge)
* Allow the hypervisor to boot bzImage kernels (see this [ patch] included since [ xen-3.3.1-3.fc11])
* Make 'new-kernel-pkg' aware of HYPERVISOR setting in /etc/sysconfig/xen
* Wait for that upstream kernel version to be pulled into Fedora
== How To Test ==
* Install a Fedora host/Dom0 system
* Turn on Xen Hypervisor by setting 'HYPERVISOR=/boot/xen-3.3.gz' in /etc/sysconfig/kernel and running some tool (TBD)
* Turn on Xen Userspace by running 'chkconfig xend on'
* Reboot
* Observe presence of Xen via /sys/hypervisor/
* Run 'xm list' and observe Domain-0
* Use virt-install to deploy a Fedora 9/10 paravirt guest
* Use virt-install to deploy a Fedora 8 paravirt guest
* Use virt-install to deploy a Fedora 8/9/10 fullyvirt guest
* Use 'virsh' to save & restore a PV guest and HVM guest
* Balloon down memory of a guest with virsh.
== User Experience ==
* Stock Fedora kernel supports Xen
* The Xen kernel does not lag behind the Fedora kernel
* All features and hardware supported on baremetal also works on Xen Dom0
* Can enable/disable use of HV via a /etc/sysconfig setting
== Dependencies ==
* Update to 'new-kernel-pkg' to know how to install HV
== Contingency Plan ==
If Dom0 support is not ready, continue the status quo of only shipping with DomU support.
== Documentation ==
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== Release Notes ==
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== Comments and Discussion ==
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Latest revision as of 16:33, 13 April 2009