Re: vmscan.c heuristic adjustment for smaller systems

From: Andrew Morton
Date: Sat Apr 17 2004 - 22:57:56 EST

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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