Messages in this thread | | | Date | Tue, 3 Mar 2009 13:52:54 +0000 | From | Mel Gorman <> | Subject | Re: [PATCH 20/20] Get rid of the concept of hot/cold page freeing |
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On Fri, Feb 27, 2009 at 10:40:17AM -0500, Christoph Lameter wrote: > On Fri, 27 Feb 2009, Nick Piggin wrote: > > > > I hope we can get rid of various ugly elements of the quicklists if the > > > page allocator would offer some sort of support. I would think that the > > > > Only if it provides significant advantages over existing quicklists or > > adds *no* extra overhead to the page allocator common cases. :) > > And only if the page allocator gets fast enough to be usable for > allocs instead of quicklists. >
It appears the x86 doesn't even use the quicklists. I know patches for i386 support used to exist, what happened with them?
That aside, I think we could win slightly by just knowing when a page is zeroed and being freed back to the allocator such as when the quicklists are being drained. I wrote a patch along those lines but it started getting really messy on x86 so I'm postponing it for the moment.
-- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab
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