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On 02/08/2013 01:13, walt wrote: |
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> On 08/01/2013 03:08 PM, Kerin Millar wrote: |
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>> On 30/07/2013 22:04, walt wrote: |
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>>> On 07/29/2013 06:29 PM, Harry Putnam wrote: |
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>>>> Can anyone post a .config for a 3.8.13 kernel that is known to work on |
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>>>> a vbox install of gentoo as guest. |
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>>>> |
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>>>> Working on a fresh install but don't have gentoo running anywhere to |
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>>>> rob a .config from. |
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>>> |
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>>> This one worked for me. |
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>>> |
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>> |
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>> <snip> |
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>> |
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>> This config is missing various options that would significantly enhance kernel performance in its capacity as a guest. |
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>> |
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>> For core paravirtualization support: |
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>> |
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>> CONFIG_PARAVIRT_GUEST |
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>> CONFIG_KVM_CLOCK |
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>> CONFIG_KVM_GUEST |
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>> |
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>> For virtio support: |
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>> |
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>> CONFIG_VIRTIO |
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>> CONFIG_VIRTIO_PCI |
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>> CONFIG_VIRTIO_BLK |
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>> CONFIG_SCSI_VIRTIO |
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>> CONFIG_VIRTIO_NET |
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>> |
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>> For the scsi/net virtio drivers to work in the guest, qemu must be started with the appropriate options. Further details can be found here: |
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>> |
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>> http://www.linux-kvm.org/page/Virtio |
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> |
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> Thanks Kerin. I don't know about Harry, but I'm no expert in virtualization. |
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> |
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> Just to clarify: I know that virtualbox and kvm are both extensions of qemu, |
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> but not exactly identical to each other. Would those same kernel options be |
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> useful in virtualbox as well as kvm/qemu? |
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|
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KVM allows for hardware-assisted virtualization via Intel VT-d or AMD-V |
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extensions. Without KVM, qemu is terribly slow. Collectively, the kernel |
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options that I mentioned would entail the use of KVM. |
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|
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Regarding VirtualBox, it does support a virtio-net type ethernet adapter |
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so you would certainly benefit from enabling CONFIG_VIRTIO_NET in a guest. |
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|
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I'm not entirely certain as to where VirtualBox stands with regard to |
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PVOPS support [1] but it would probably also help to enable |
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CONFIG_PARAVIRT_GUEST (even though there are no directly applicable |
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sub-options). |
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|
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--Kerin |
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|
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[1] |
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http://www.slideshare.net/xen_com_mgr/the-sexy-world-of-linux-kernel-pvops-project |
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