Messages in this thread | | | Date | Fri, 10 Feb 2006 01:21:09 +1100 | From | Nick Piggin <> | Subject | Re: [PATCH] mm: Implement Swap Prefetching v22 |
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Con Kolivas wrote:
> I really don't want to go throwing out pagecache without some smart semantics > and then swap in random stuff that could be crap I agree. The answer to this > is for the vm itself to have an ageing algorithm like the clockpro stuff > which does this in a smart way. It could certainly age away the updatedb > wrinkles and leave some free ram - which would help/be helped by prefetching. >
AFAIK clockpro will not leave free ram, will it?
Getting a little hand-wavy; I don't think the updatedb problem needs to be fixed by a really fancy page reclaim algorithm (IMO, and that's not to say that a fancy reclaim algorithm wouldn't be nice for other reasons). Just small improvements here and there, and there will always be a tradeoff between throughput and interactive pagein latency so in the end it might need a tunable (hey there is one - maybe it needs to be improved)
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