kernel panic with greater that 8 GB of memory

Steve Kargl sgk at
Tue Nov 30 11:42:29 PST 2004

On Tue, Nov 30, 2004 at 02:35:30PM -0500, Ketrien I. Saihr-Kenchedra wrote:
> On Tue, 30 Nov 2004, Steve Kargl wrote:
> <slice and dice>
> >The system starts to boot and dmesg reports the 16 GB of memory, but
> >I rapidly get this panic.
> <snippity!>
> >So, it looks like ACPI on this Tyan motherboard is restricting
> >the memory to 8G.
> I presume you're using CM74SD2048RLP-2700/S DIMMs? (Corsair/Samsung 2GB
> ECC Reg'd.) 


> More importantly, which BIOS version? You have to run the 2.03 BIOS on 
> the K8SPro if you're running 16GB. Make sure that ccNUMA support is off
> in the BIOS as well - this was a never-ending source of fun on both the
> S2882 and S4882's. I can't tell you exactly why, but having ccNUMA on
> with the S4882 and S288x's is a never-ending font of panic()s. But the
> 2.01 and 2.02 BIOSes on the S2882 are exceptionally miserable.
> At least it's not an S4882 1.02:
> "DDR 400MHz Memmory Detected"

The BIOS is at 2.03.  I haven't tried turning off the ccNUMA support.
I'll give it a shot in a moment.


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