Re: 64 bit kernel

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Stan Gammons <[email protected]> writes:

First you get the price of the day for meaningless subjects. Gratulations.

> I was wondering if anyone can tell me if the following is a 64 bit
> kernel problem or if it's a BIOS problem.
> 
> I have a Gigabyte K8NSC-939 with an AMD64 3200+ (Venice) CPU version F7
> BIOS. When I first got this board, I put a single 512 Mb PC2700 DIMM in
> it from an older Celeron board I had. 32 bit Suse 10.0 and 32 bit FC4
> loaded fine. When I tried the 64 bit version of either, I kept getting
> DMA errors on boot like the HD or controller was bad. After some
> searching I found others with similar problems and they had to use
> "noapic nolapic" kernel boot options to install and boot the OS. That
> worked for me too and I was able to install the OS.

That's usually an ACPI problem. Put full boot log of the failure
and acpidmp output into bugzilla.kernel.org

The difference between 32bit and 64bit distro is that the later
use the APIC by default so they are more sensitive to ACPI issues.

> 
> After I upgraded the memory and put 2 512Mb PC3200 DIMMS in the board. I
> tried a 64 bit install again. This time I no longer had to use the
> "noapic nolapic" options. With a single DIMM, BIOS (during boot)
> reported "single channel" memory. With 2 DIMMS, BIOS (during boot)
> reports "dual channel" memory. My question though is does the 64 bit
> kernel require "dual channel" memory or is this a BIOS problem?  

That sounds weird. Most likely a BIOS problem of some sort.

Dual or single channel memory shouldn't make a difference to the kernel.
 
-Andi
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