On Sat, 3 Nov 2007, Matt Mackall wrote:

quoted text
> This is typically due to a problem with the setup of your MTRRs. Try
> booting with mem=nnnM where nnn is some number smaller than your
> actual amount of memory.

Thank you for that advice, the system has 4GB and if I boot with mem=3072M 
it will run as fast as normal while if I don't use the mem option it will 
run 10 times slower, however if I use a figure like mem=3500M the kernel 
will panic, is there any way to determine the highest usable figure 
without try and error?
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