Re: [PATCH 8/8] vm: Add an tuning knob for vm.max_writeback_mb

[Wu Fengguang]

On Wed, Sep 09, 2009 at 08:28:06PM +0800, Christoph Hellwig wrote:
> 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..

Ah OK. I'm using latest linux-next and expected his patches to be there..

Thanks,
Fengguang

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