= 2011-10-26 =

== Virtualization ==

 * [http://www.cio.com/article/print/692428 Linux Kernel Now Supports OpenRISC, Nested Virtualization] - Linux Kernel 3.1 支援在虛擬機器裡面開啟虛擬機器。
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Linux has support for nested virtualization within the KVM (Kernel-based Virtual Machine) hypervisor. 
This feature, built from AMD's Nested VMX, allows a virtual machine to be run from inside another. 
Linux will also provide KVM with the ability to tap into the SMEP (Supervisory Mode Execute Protection) 
of Intel's next-generation Ivy Bridge processors, which should reduce some of the performance overhead 
typically associated with virtual clients.

Users of the Xen hypervisor get some new features as well: Linux 3.1 will be the first to allow Xen-based 
virtual machines to directly access devices on a PCI bus, a capability previously only available through 
a patch. It also folds in Xen's Balloon Driver, which can be used to adjust the amount of working memory 
used by a virtual machine during operation.
}}}