Messages in this thread | | | Subject | Re: Kernel 2.4.16 & Heavy I/O | Date | Thu, 6 Dec 2001 22:50:39 +0000 (GMT) | From | Alan Cox <> |
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> Once a page is used twice, it's not a candidate for eviction > until (most of) the use-once pages are gone. > > This means that if you have these 40 MB of used-twice-but-never-again > buffer cache memory, this memory will never be evicted until other > pages get promoted from use-once to active.
Its worth noting btw that you can intentionally exploit this in an app to get unfair use of memory. That makes me very dubious about the heuristic
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