Microsoft struggles to get Hyper-V drivers in Linux kernel

It was recently reported that Microsoft is now one of the top corporate contributors to the Linux kernel. But the reason for Redmond's recent flurry of contributions lies in the fact that its two-year-old project to get Hyper-V drivers into the Linux kernel has taken longer than expected. The drivers are still in the kernel staging tree, and Microsoft has to finish the items on a to-do list before Hyper-V drivers can move out of the staging area. When asked why it's taken so long, Linux project leader Greg Kroah-Hartman says the issue was simply that "changes were not being submitted that frequently."