VOOZH about

URL: https://www.phoronix.com/news/Linux-6.15-Hyper-V

⇱ Microsoft Brings Two More Features To Hyper-V With Linux 6.15 - Phoronix


👁 Phoronix

Microsoft Brings Two More Features To Hyper-V With Linux 6.15

Written by Michael Larabel in Microsoft on 26 March 2025 at 05:53 AM EDT. 4 Comments
With the Microsoft Hyper-V virtualization updates for the Linux 6.15 kernel there are two new features worth mentioning.

First and foremost, the Hyper-V updates for the mainline Linux 6.15 kernel bring support for running as the root partition in the Microsoft Hypervisor (Hyper-V) by exposing /dev/mshv. For more background information on that root partition support, see last year's article Microsoft Continues Working On Hyper-V Dom0 Support For Linux.

The other new Hyper-V feature worth mentioning is support for CPU offlining in Hyper-V. Yes, until now it wasn't possible to offline CPU cores under Hyper-V but now that ability is wired up. Offlining of CPU cores was previously not possible due to VMBUS channels attached to them while now the Hyper-V driver properly deals with the situation if wanting to take any CPU cores offline.

There are also various fixes and smaller improvements as part of the Linux 6.15 Hyper-V updates as noted within the pull request, which has already been merged to Linux Git.

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.