On Thu, Nov 02, 2000 at 12:45:30AM -0800, David Greenman wrote:
> >Interesting. THis needs about two bytes per page for the counter?
>    Actually, we found that a single byte per page was sufficient. Pages tended
> to be either heavily accessed or rarely accessed. Even in the unusual case
> where all pages are frequently accessed, the page reclaim rate (and thus
> adjustment rate of the page references count) increases high enough to still
> provide for a decent distribution of the counters and for the page LOU to be
> effective.

One byte sounds good for i386.
Maybe it makes sense to have it 4 or 8 byte on risc platforms.
I wonder if it's a critical path and if there are more of this in
the kernel source.

B.Walter              COSMO-Project         http://www.cosmo-project.de
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