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On Sun, 4 Nov 2001, Lorenzo Allegrucci wrote: > > I begin with the last Linus' kernel, three runs and kswapd CPU > time appended. It's interesting how your numbers decrease with more swap-space. That, together with the fact that the "more swap space" case also degrades the second time around seems to imply that we leave swap-cache pages around after they aren't used. Does "free" after a run has completed imply that there's still lots of swap used? We _should_ have gotten rid of it at "free_swap_and_cache()" time, but if we missed it.. What happens if you make the "vm_swap_full()" define in <linux/swap.h> be unconditionally defined to "1"? That should make us be more aggressive about freeing those swap-cache pages, and it would be interesting to see if it also stabilizes your numbers. Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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