Rik van Riel wrote:

Actually, FreeBSD has a special case in the page fault code
for sequential accesses and I believe we must have that too.

Where is that code? I found a sysctl parameter vm_pageout_algorithm_lru,
but nothing else.

Both LRU and LFU break down on linear accesses to an array
that doesn't fit in memory. In that case you really want
MRU replacement, with some simple code that "detects the
window size" you need to keep in memory. This seems to be
the only way to get any speedup on such programs when you
increase memory size to something which is still smaller
than the total program size.

Do you have an idea how to detect that situation?

--
	Manfred
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