Nice. (Haven't looked at it, but I like the idea).
For large parallel makes I've used a `preload_cache' program that pulls
files into cache just prior to using them for a compile, and sits on a
mutex to prevent pulling in two simultaneously (that would cause head
thrashing).
The idea was to reduce or even (gasp!) eliminate head thrashing while
doing parallel makes. It worked, but it's only worth it of the source
files are large (mine were multi-megabyte images). So probably not
worth it for the kernel makefiles.
-- Jamie
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