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KVM Gets Two New Features In Linux 3.12

Virtualization

Published on 05 September 2013 01:44 AM EDT
Written by Michael Larabel in Virtualization
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The KVM pull request was accepted on Wednesday for the Linux 3.12 kernel. This KVM pull has two major new features.

New to KVM virtualization on Linux with the 3.12 kernel is support for nested EPT and PV-TicketLocks. The first is support for nested Extended Page Tables while the PV-TicketLocks code is ported to KVM from the Xen code.

The new Paravirtualized Ticket Spinlocks replaces earlier ticket lock code for virtualization and is meant to better deal with vCPUs. The work on PV-TicketLocks has mostly come from IBM for both Xen and KVM. More information on PV-TicketLocks including benchmarks can be found from the Xen.org blog.

Aside from this modest feature work, there's also KVM bug-fixes for all major supported architectures. More details on the KVM virtualization code churn for the 3.12 merge window can be found via this Git commit.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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