| 1 | <?xml version='1.0' encoding='UTF-8'?>
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| 2 | <!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
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| 3 | <topic xml:lang="en-us" id="vboxandsolzvmm">
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| 4 | <title><ph conkeyref="vbox-conkeyref-phrases/product-name"/> and Oracle Solaris Kernel Zones</title>
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| 5 |
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| 6 | <body>
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| 7 | <p>Oracle Solaris kernel zones on x86-based systems make use of hardware-assisted virtualization features like <ph
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| 8 | conkeyref="vbox-conkeyref-phrases/product-name"/> does. However, for kernel zones and <ph
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| 9 | conkeyref="vbox-conkeyref-phrases/product-name"/> to share this hardware resource, they need to cooperate. </p>
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| 10 | <p>By default, due to performance reasons, <ph conkeyref="vbox-conkeyref-phrases/product-name"/> acquires the
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| 11 | hardware-assisted virtualization resource (VT-x/AMD-V) globally on the host machine and uses it until the last <ph
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| 12 | conkeyref="vbox-conkeyref-phrases/product-name"/> VM that requires it is powered off. This prevents other
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| 13 | software from using VT-x/AMD-V during the time <ph conkeyref="vbox-conkeyref-phrases/product-name"/> has taken
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| 14 | control of it. </p>
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| 15 | <p><ph conkeyref="vbox-conkeyref-phrases/product-name"/> can be instructed to relinquish use of hardware-assisted
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| 16 | virtualization features when not executing guest code, thereby allowing kernel zones to make use of them. To do
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| 17 | this, shutdown all <ph conkeyref="vbox-conkeyref-phrases/product-name"/> VMs and execute the following command: </p>
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| 18 | <pre xml:space="preserve">$ VBoxManage setproperty hwvirtexclusive off</pre>
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| 19 | <p>This command needs to be executed only once as the setting is stored as part of the global <ph
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| 20 | conkeyref="vbox-conkeyref-phrases/product-name"/> settings which will continue to persist across host-reboots
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| 21 | and <ph conkeyref="vbox-conkeyref-phrases/product-name"/> upgrades. </p>
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| 22 | </body>
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| 23 |
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| 24 | </topic>
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