Re: I'm having 4GB RAM, but Linux sees just 3GB???

[Brian Gerst <bgerst@didntduck.org>]

Christian Parpart wrote:
> Hi all,
> 
> I was asking this in gentoo-server mailing list before, however, they finally 
> pointed me to this place as it could also be a bug in the kernel.
> 
> I'm having a TYAN board with two AMD Opteron 248 and 4x 1GB ECC RAM on it. The 
> BIOS reflects what I've plugged in, however, the operating system does not.
> 
> my `uname -a` output is:
> Linux battousai 2.6.11-gentoo-r8 #1 SMP Sat May 14 02:42:15 CEST 2005 x86_64 
> AMD Opteron(tm) Processor 248 AuthenticAMD GNU/Linux
> 
> and my `dmidecode` output is located at [0]. For ANY reason, dmidecode even 
> knows about my 4GB RAM, but `free -m` nor `kinfocenter` of KDE claims to see 
> just 3GB.
> 
> free -m:
>              total       used       free     shared    buffers     cached
> Mem:          3015       2993         22          0         15       2638
> -/+ buffers/cache:        338       2677
> Swap:          511          1        510
> 
> This is rather sad to see 1GB RAM plugged in for nothing.
> 
> Has anyone a hint for my WHY this is happening and HOW I could get rid of it?
> 
> Thanks in advance,
> Christian Parpart.
> 
> [0] http://dev.gentoo.org/~trapni/dmidecode.txt
> 

Are you running a 64-bit kernel?  What does "dmesg | grep e820" show?

--
				Brian Gerst