Re: vmscan.c heuristic adjustment for smaller systems

[Andrew Morton]

William Lee Irwin III <wli@xxxxxxxxxxxxxx> wrote:
>
>  On Sat, Apr 17, 2004 at 04:51:51PM -0700, Andrew Morton wrote:
>  > I'd assume that setting swappiness to zero simply means that you still have
>  > all of your libc in pagecache when running ls.
>  > What happens if you do the big file copy, then run `sync', then do the ls?
>  > Have you experimented with the NFS mount options?  v2? UDP?
> 
>  I wonder if the ptep_test_and_clear_young() TLB flushing is related.

That, or page_referenced() always returns true on this ARM implementation
or some such silliness.  Everything here points at the VM being unable to
reclaim that clean pagecache.
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