Re: [patch] swap-speedup-2.4.3-B3 (fwd)

From: Marcelo Tosatti (
Date: Wed Apr 25 2001 - 22:00:35 EST

On Thu, 26 Apr 2001, Mike Galbraith wrote:

> > Comments?
> More of a question. Neither Ingo's nor your patch makes any difference
> on my UP box (128mb PIII/500) doing make -j30.

Well, my patch incorporates Ingo's patch.

It is now integrated into pre7, btw.

> It is taking me 11 1/2
> minutes to do this test (that's horrible). Any idea why?~

Not really.

If you have concurrent swapping activity, pre7 should improve the
performance since all swap IO is asynchronous now. Only paths which really
need to stop and wait for the swap data are doing it. (eg do_swap_page)

> (I can get it to under 9 with MUCH extremely ugly tinkering. I've done
> this enough to know that I _should_ be able to do 8 1/2 minutes ~easily)

Which kind of changes you're doing to get better performance on this test?

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