Less physical memory?
 

Hi,

Config:
- Asus P4S800-MX
- Celeron 2.4Ghz
- 2Gb DDR/2*1024 (-64Mb shared video) total 1984Mb

I have Debian Sarge installed with the linux26 option with Grub.

The system displays less than 1Gb of memory with free/top. However, when I check the amount of RAM in Grub, it seems to show nearly 2Gb.

I remember that Lilo has the mem= option. Is this an option in Grub as well?

Can anyone please tell me how I can use all of my dearly paid memory?


Thanx

You'd need your kernel configured with CONFIG_HIGHMEM4G to take advantage of >1GB of RAM.

Thanks a lot for your answer. Hopefully I will have some time today to test this. Do you know if this is mentioned in the Debian Sarge installation document?

I have changed /boot/config-2.6.8-2-386 with the following:

CONFIG_EDD=m
CONFIG_NOHIGHMEM=y
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_MATH_EMULATION=y
CONFIG_MTRR=y
# CONFIG_EFI is not set
# CONFIG_REGPARM is not set

Nothing changed. Should this be enough, or do I have to compile my own kernel?

Thanx for your help so far.

Yes, you must recompile your kernel for the changes to take place. In case you're not familiar with kernel compiling, ask back here or do a google search for "Compiling a 2.6 kernel" which should get you plenty of hits.

Yes, unless debian distributes a kernel with highmem support enabled by default.