Xen users - Dec 2006 - What is the purpose of the ref-linux-foo tree ?

Hi

I''ve been trying to understand the linux -> Xen patching process. I
get that the sparse tree contains extra files to be added and the
patches directory contains patches to be added to the
pristine-linux-foo tree. This should get us the ready to compile
linux-foo-xen tree. However I dont understand what is the purpose of
the ref-linux-foo tree ?

Anyone have any ideas ?


Thanks
-Amitabha

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