I had thought about this. the two approaches we can learn from is lguest and paravirt.
basically colinux could be another architecture in kernel tree on host and guest implement something similar to paravirt-ops.

On Thu, Sep 27, 2012 at 4:47 PM, Shao Miller <sha0.miller@gmail.com> wrote:
What is the Linux kernel upstream position on any coLinux changes getting
merged, or has there been any discussion about this?

I'm sure some of the #ifndef CONFIG_COOPERATIVE changes might be considered
to spaghettify the code, but have alternative strategies been pondered or

- Shao

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