Messages in this thread | | | Date | Sun, 18 Apr 2010 21:32:38 -0700 | From | Arjan van de Ven <> | Subject | Re: [PATCH] mm: disallow direct reclaim page writeback |
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On Mon, 19 Apr 2010 11:08:05 +1000 Dave Chinner <david@fromorbit.com> wrote:
> > Maybe we need to do the background dirty writes a bit more > > aggressive... or play with heuristics where we get an adaptive > > timeout (say, if the file got closed by the last opener, then do a > > shorter timeout) > > Realistically, I'm concerned about preventing the worst case > behaviour from occurring - making the background writes more > agressive without preventing writeback in LRU order simply means it > will be harder to test the VM corner case that triggers these > writeout patterns...
while I appreciate that the worst case should not be uber horrific... I care a LOT about getting the normal case right... and am willing to sacrifice the worst case for that.. (obviously not to infinity, it needs to be bounded)
-- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org
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