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    SubjectRe: vmscan.c heuristic adjustment for smaller systems
    William Lee Irwin III <wli@holomorphy.com> 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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