How do your tests work? Do you examine PTEs directly to check for superpages
or are you relying on the vm.pmap.pde sysctls?
the later.
anyway - algorithm described on list - that heuristics detects consecutive
page access doesn't really help the urgent case - RANDOM access to large
amount of memory.
sequential access will get minimal improvement.
IMHO the only way that really make sens is to add options to madvise to
give kernel information about usage.
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