On Tue, 28 Aug 2001, David S. Miller wrote:
>
> At least something seems to be broken in it. I did run some 900MB processes
> on a 512MB machine with 2.4.9 and kswapd took between 70 and 90% of the CPU
> time.
>
> That's all swapmap lookup stupidity, you'll see __get_swap_page()
> near the top of your profiles. The algorithm is just sucky.
Well, in all fairness the kswapd changes _do_ make kswapd more eager to
keep running too (ie kswapd tends to keep running until there is no
shortage any more - which it traditionally hasn't really done).
There might be an argment for making kswapd less eager, and more of a
background thing.
Regardless of where it actually spends the CPU time.
Linus
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This archive was generated by hypermail 2b29 : Fri Aug 31 2001 - 21:00:31 EST