Messages in this thread | | | Subject | Re: [PATCH] mm: Implement swap prefetching tweaks | From | Mike Galbraith <> | Date | Sat, 11 Mar 2006 08:51:39 +0100 |
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On Sat, 2006-03-11 at 18:24 +1100, Con Kolivas wrote: > On Saturday 11 March 2006 17:00, Mike Galbraith wrote:
> > If you're creating a lot of traffic, I can see it causing problems. I > > was under the impression that you were doing minimal IO and absolutely > > trivial CPU. That's what didn't make sense to me to be clear. > > A lot of cpu would be easier to handle; it's using absolutely miniscule > amounts of cpu. The IO is massive though (and seeky in nature), and reading > from a swap partition seems particularly expensive in this regard.
There used to be a pages in flight 'restrictor plate' in there that would have probably helped this situation at least a little. But in any case, it sounds like you'll have to find a way to submit the IO in itty bitty synchronous pieces.
-Mike
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