IIRC, Martin J. Bligh had a patch which displayed information about the
buddy allocator freelist so that will probably be the starting point. From
there, it should be handy enough to see how intermixed are kernel page
allocations with user allocations. It might turn out that kernel pages
tend to be clustered together anyway.

That should be merged now - /proc/buddyinfo. I guess you could do the same
for allocated pages (though it'd be rather heavyweight ;-))

M.

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