Re: Memory upgrade causes slowdown; why?

Mike Jagdis (mike@toaster.roan.co.uk)
Wed, 23 Oct 1996 08:41:41 GMT

In article <199610222349.QAA19409@goodguy.goodnet.com>, Shawn Rutledge wrote:
>
>I just upgraded my system from 16 megs to 32 megs, and now Linux crawls
>(so bad that I took the new SIMM back out, temporarily I hope!) X takes
>2 or 3 times as long to start up, kernel builds take longer, that sort of
>thing.

Check your motherboard manual. It sounds like it is only caching the
lower 16MB, either because of a setup option or because of a lack
of cache memory.

Incidentally when I get my new page allocation finished it will, as
a side effect, help such systems since it tends to focus usage on the
DMA-able memory which, on an ISA class machine, is the lower 16MB.

Mike

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