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kernel modification and CONFIG_HIGHMEM issue

From: P Kapat <kap4lin(at)gmail.com>
Date: Tue Jun 26 2007 - 22:59:10 EDT

Hi,

I am running Debian unstable on an AMD Athlon 64 3500+ processor and a MSI K8N Neo4 Mobo.

Problem: Kernel does not recognise all the RAM, it sees only 1GB.

$ uname -a

Linux *** 2.6.18-4-486 #1 Mon Mar 26 16:39:10 UTC 2007 i686 GNU/Linux

I had two 512MB modules, recently I added two 1 GB models hoping to see around 3GB of RAM. But the kernel reads only 1 GB. A little bit of googling helped me to understand that the kernel is not compiled for using higher memories.

$ grep HIGHMEM /boot/config-2.6.18-4-486
CONFIG_NOHIGHMEM=y
# CONFIG_HIGHMEM4G is not set
# CONFIG_HIGHMEM64G is not set

I have been using linux-image-2.6-486 (which is 32bit) kernel to avoid the restrictions (unavailability of flash, media codecs etc) of 64 bit platform. Here are my two questions:

Is it possible to overcome the memory restriction under the current setup? At this moment I don't have time to install a 64-bit version kernel and go over the whole re-installation procedure.
When I do get time and feel comfortable to move to a native 64bit machine, which kernel should I use? The options I am looking at are: a) linux-image-2.6-amd64 (under amd64 or i386 arch?) b) linux-image-2.6-k7 (under amd64 or i386 arch?) c) linux-image-2.6-vserver-amd64 (amd64 arch only) d) linux-image-2.6-vserver-k7 (i386 arch only)

I am not sure what the "-vserver-" images are and does my processor come under the k7 class?

Do you need help?

Thanks in advance for the advice. Its much appreciated.

-- 
Regards
PK
--------------------------------------
http://counter.li.org  #402424


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Received on Tue Jun 26 22:59:40 2007

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