Re: An idea for prefetching swapped memory...

David Zaffiro (davzaffiro@netscape.net)
Mon, 07 Apr 2003 14:32:26 +0200


> The idea was about prefetching swapped out pages when some memory is free, the
> CPU is idle and the I/O load is low.
>
> So this should not 'cost' much but behave better on following situation:
> (I think there are even more such situations, this one should just be an
> example)

Wouldn't it cost almost twice as much when the user requests a different task, instead of the just
swaped-in "last swaped-out task(s)"?!

Instead of loading this directly into a free portion of phys. memory, the
just-swapped-in-ex-swapped-out task(s) would need to be swapped-out *again* in favour of the
to-be-swaped-in task...

Or am I wrong here?

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