Messages in this thread | | | Date | Wed, 4 Aug 2010 12:10:06 +0100 | From | Mel Gorman <> | Subject | Re: Why PAGEOUT_IO_SYNC stalls for a long time |
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On Sun, Aug 01, 2010 at 05:47:08PM +0900, KOSAKI Motohiro wrote: > > > side note: page lock contention is very common case. > > > > > > For case (8), I don't think sleeping is right way. get_page() is used in really various place of > > > our kernel. so we can't assume it's only temporary reference count increasing. > > > > In what case is a munlocked pages reference count permanently increased and > > why is this not a memory leak? > > V4L, audio, GEM and/or other multimedia driver? >
Ok, that is quite likely. Have you made a start on a series related to lumpy reclaim? I was holding off making a start on such a thing while I reviewed the other writeback issues and travelling to MM Summit is going to delay things for me. If you haven't started when I get back, I'll make some sort of stab at it.
-- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab
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