Mandrake 10.0CE secure kernel restricts RAM

mpdegroat · 06-03-2004, 05:24 PM

Hello,

I work for a govenrment contractor that requires that our workstations be locked down pretty tight. I'm using Mandrake 10.0 CE and we're using the secure kernel, however, this restircts our memory. We have some machines that have over 4GB that need full access to this memory. Can anyone tell me how I can chnage this without sacrificing the rest of the secure kernel?

Thanks,

Michael

Michael De Groat
System Administrator
Numerica Corp.

mascdman · 06-03-2004, 07:45 PM

Assuming you have the kernel-source rpm installed, you could recompile a kernel. If you are running the secure kernel, the kernel configuration should be available in /proc/config.gz. Just copy and uncompress that file to /usr/src/linux/.config and change the following options

Code:

...
CONFIG_NOHIGHMEM=y
# CONFIG_HIGHMEM4G is not set
# CONFIG_HIGHMEM64G is not set
...

to

Code:

# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_HIGHMEM=y

Or say yes to CONFIG_HIGHMEM64GB if you need more than 4GB. If you want to use menuconfig, those options are under

Code:

Processor type and features  --->
   High Memory Support (off)  --->
      (X) off
      ( ) 4GB
      ( ) 64GB

Hope this helps (and works).

--mascdman