On Wed, Jul 14, 2010 at 2:28 PM, Stephen Harris lists@spuddy.org wrote:
On Wed, Jul 14, 2010 at 02:20:10PM -0500, Victor Padro wrote:
they're not explicit as I stated but perhaps it just states as VT-D or something that you may overlooked it.
VT-d (Virtualization Technology for Directed I/O) is virtualization for devices. With this it's possible for a guest OS to have direct exclusive access to hardware devices (maybe one of the USB controllers, or a disk controller). This is, really, a layer violation but it can be a performance gain or allow VMs to access hardware that the hypervisor can not emulate. My machine, apparently, supports VT-d in the BIOS but either the chipset (H55) doesn't support it or something else is wrong; the capability isn't available to the hypervisor.
This isn't needed for CPU virtualization to work.
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rgds Stephen _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Yes I know, but the idea is to look a little bit more in such entries, isn't? ;)
AFAIK, VT-d is only implemented LGA 1156/P55 and 34XX Chipsets: http://www.intel.com/products/server/chipsets/3400-3420/3400-3420-overview.h...