Re: kernel oops with x64_86 crossing 4Gb boundary

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Francois Pepin <[email protected]> writes:

> Hi,
> 
> I am getting pseudo-random kernel oops on my Opteron box (Tyan Thunder
> K8W) with 4Gb RAM. I am running RedHad FC3 with kernel
> 2.6.11-1.35_FC3smp.
> 
> It runs well with default BIOS settings, but only 3.5Gb RAM are visible.
> Using the "Software Memory Hole" option in the BIOS (version 3.02)
> remaps the last 2Gb to 4-6Gb. This causes kernel oops with various
> applications, generally killing them.
> 
> I can reproduce it by loading lots of data into R (which caused the oops
> below). Various other applications have caused it

Software memory hole is broken in the BIOS. Don't use it.

-Andi

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