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KVM Gains Additional Support in Linux 2.6.26 Kernel and Native Network IO Performance
Posted by Scott Delap on Jul 16, 2008 09:38 PM
The new 2.6.26 version of the Linux kernel has been released after three months of development. Among the high level features its adds are:- read-only bind mounts
- ports of KVM to IA64, S390 and PPC
- other KVM improvements including basic paravirtualization support
- preliminary support of the future 802.11s wireless mesh standard
Specific to virtualization, the KVM additions add support for nested paging and x86 hardware task switching. ZDNet also points out:
...Among the most significant improvements are changes to the Kernel-based Virtual Machine (KVM) virtualization software... the latest kernel update adds limited support for paravirtualization, a technique that only partially virtualizes the hardware in order to improve performance ... KVM has also, for the first time, been ported to non-x86 hardware platforms Intel IA64 and IBM PPC and S/390, developers said ...
The first version of KVM was included in Linux 2.6.20 in February of 2007. Earlier this year RedHat announced a new hypervisor based on KVM. In related news the KVM development team has announced achieving native network IO performance using pci passthrough with VT-d technology. They note that in the past certain workloads have not been virtualized due to network contention issues. Technologies such as Intel's VT-d should increase the variety areas that virtualization can be applied.
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