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    SubjectRe: [PATCH 8/8] vm: Add an tuning knob for vm.max_writeback_mb
    On Wed, Sep 09, 2009 at 05:29:01PM +0800, Wu Fengguang wrote:
    > It seems that balance_dirty_pages() is not coupled with MAX_WRITEBACK_PAGES.
    > Instead it uses the much smaller (ratelimit_pages + ratelimit_pages / 2).

    With Jen's writeback patches applied balance_dirty_pages does not start
    writeback itself anymore but calls bdi_start_writeback to let the
    flusher thread do it.

    it would be good if we do any writeback tuning ontop of these patches..


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