On Sun, Sep 12, 2010 at 11:49:46PM +0800, Wu Fengguang wrote: > The dirty_ratio was siliently limited in global_dirty_limits() to >= 5%. > This is not a user expected behavior. And it's inconsistent with > calc_period_shift(), which uses the plain vm_dirty_ratio value. > > Let's rip the arbitrary internal bound. It may impact some very weird > user space applications. However we are going to dynamicly sizing the > dirty limits anyway, which may well break such applications, too. > > At the same time, fix balance_dirty_pages() to work with the > dirty_thresh=0 case. This allows applications to proceed when > dirty+writeback pages are all cleaned. > > And ">" fits with the name "exceeded" better than ">=" does. Neil > think it is an aesthetic improvement as well as a functional one :) > > CC: Jan Kara <jack@xxxxxxx> > Proposed-by: Con Kolivas <kernel@xxxxxxxxxxx> > Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> > Reviewed-by: Rik van Riel <riel@xxxxxxxxxx> > Reviewed-by: Neil Brown <neilb@xxxxxxx> > Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> > Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>