Re: [gentoo-server] Opteron; BIOS ack's all 4GB RAM, but OS does not

[Christian Parpart]

On Saturday 14 May 2005 6:28 pm, Bastian Balthazar Bux wrote:
> Christian Parpart wrote:
> > Hi all,
> >
> > I finally got it; my Operaton workstation with 2x Opteron248 CPUs and 4GB
> > RAM is arrived. However, the BIOS says that I really have 4GB RAM inside,
> > that I have, but the Linux is just telling me something about 3GB. `free
> > -mt` as well as `kinfocenter` are telling this. Although, I
> > (unfortunately) *had* to install windows2003 on a partition, too (for
> > working for my company), and there it is also just telling me something
> > about 3 (instead of 4) GB RAM.
> >
> > Did I miss something?
> >
> > mem=4096M in boot commandline didn't help there much.
> >
> > I'm having a TYAN board, with PhoenixBIOS on it. The handbook is far off
> > being a good handbox, so, did I miss something I should
> > configure/reconfigure in the BIOS then, so, that the OS will use all RAM?
>
> theese are more or less memory related values in my kernel config
>
> CONFIG_MTRR=y
> CONFIG_K8_NUMA=y
> CONFIG_DISCONTIGMEM=y
> CONFIG_GART_IOMMU=y

trapni@battousai ~ $ zgrep -E 'CONFIG_(MTRR|K8_NUMA|DISCONTIGMEM|
GARTIOMMU)' /proc/config.gz
CONFIG_MTRR=y
CONFIG_K8_NUMA=y
CONFIG_DISCONTIGMEM=y

though, CONFIG_GART_IOMMU must have been disabled, and I remember I did not 
enable gart at all because I'm having Nvidia GeForce 6600GT (PCI-express) and 
wanna use the `Option "NvAGP" "1"` line in my xorg.conf - this is at least 
what I had with my old GeForce 5200 working before.

> and this my "free" output:
> free -m
>              total       used       free     shared    buffers     cached
> Mem:          3429       3069        359          0        627       1775
> -/+ buffers/cache:        667       2762
> Swap:            0          0          0

trapni@battousai ~ $ free -m
             total       used       free     shared    buffers     cached
Mem:          3015       2990         24          0         11       2136
-/+ buffers/cache:        843       2172
Swap:          511         19        492

that's really borring looking at the Mem-total line, it should be anything 
around 4048, not 3015 anyway...

though, it's unfortunately *not* the same as you.

but, why duo have a total-mem of 3429M? how much RAM duo have physically 
plugged in to your board's slots?

Regards,
Christian Parpart.

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