Xen FAQ Booting: Difference between revisions
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<!-- MoinMoin name: XenFaq --> |
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<!-- Comment: Added link to XenFAQ2 --> |
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<!-- WikiMedia name: XenFaq --> |
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<!-- Page revision: 00000096 --> |
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<!-- Original date: Wed Sep 14 11:36:18 2011 (1316000178000000) --> |
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<!-- #pragma section-numbers on --> |
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<!-- ! TOC here --> |
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= Booting Xen = |
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== How do I hide a pci device from dom0? == |
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In Xen 2.x, you can add the <code><nowiki>physdev_dom0_hide</nowiki></code> parameter (see [[Xen Hypervisor Boot Options]] for more parameters) to hide one or more pci devices to Dom0, so you can affect them to domU. |
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Pci slots MUST be formatted like this: |
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* '''(nn:nn.n)''' |
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so |
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* <code><nowiki>(03:06.1)</nowiki></code> is correct |
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* <code><nowiki>(03:6.1)</nowiki></code> is NOT correct |
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You can get the pci bus address on a Linux system by using the lspci command (only the last bits are relevant): |
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<pre><nowiki> |
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lspci | grep Ethernet |
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0000:02:03.0 Ethernet controller: Intel Corp. 82546EB Gigabit Ethernet Controller (Copper) (rev 01) |
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0000:02:03.1 Ethernet controller: Intel Corp. 82546EB Gigabit Ethernet Controller (Copper) (rev 01) |
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</nowiki></pre> |
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Then: |
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* to hide the second network interface from dom0, you can then append <code><nowiki>physdev_dom0_hide=(02:03.1)</nowiki></code> to your <code><nowiki>kernel /boot/xen-2.0.gz</nowiki></code>. |
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* to hide multiple pci devices, simply concatenate all the pci slots address like this: <code><nowiki>physdev_dom0_hide=(02:03.0)(02:03.1)</nowiki></code> |
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If everything went ok, you should see the following lines after a reboot: |
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<pre><nowiki> |
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(XEN) Hiding PCI device 02:03.0 from DOM0 |
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(XEN) Hiding PCI device 02:03.1 from DOM0 |
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</nowiki></pre> |
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== Error about root device still mounted when it's not mounted, zombie domU that can't be killed, domU hangs under heavy I/O (e.g disk) access == |
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This is an unresolved problem with Xen 3.0. |
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You may try to [http://lists.xensource.com/archives/html/xen-users/2006-03/msg00651.html pass nousb to dom0 kernel command line], or [http://lists.xensource.com/archives/html/xen-devel/2005-07/msg00436.html pass ignorebiostables], or try to [http://lists.xensource.com/archives/html/xen-devel/2005-07/msg00468.html disable software IRQ affinity for 1850/2850 systems]. |
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* [http://lists.xensource.com/archives/html/xen-users/2006-02/msg00851.html Discussion in xen-users mailing list] |
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[[Category:Xen]] |
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[[Category:FAQ]] |
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[[Category:Users]] |
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[[Category:Beginners]] |
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