UML (user mode linux) for Fedora

[Richard W.M. Jones]

On Fri, Aug 09, 2013 at 10:52:15AM +0100, Daniel P. Berrange wrote:
> Does UML kernel even build on Fedora these days ? I tried to build it
> a year or so back and found that it had ben broken by GCC/LD update
> and no one upstream showed any interest in fixing it. So I rather
> considered UML to be dead after that experiance.

Yes, it compiles fine.

As the other reply states, it's not completely reliable, and at least
one feature has certainly bit-rotted:

  http://thread.gmane.org/gmane.linux.uml.devel/13556

On the other hand, it's damn fast.  A UML instance boots up in a
fraction of a second (compared to around 3 seconds which is the
fastest I can boot an ordinary Fedora kernel on KVM).  It's very close
to being a viable backend for libguestfs:

  https://www.redhat.com/archives/libguestfs/2013-August/msg00005.html

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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