The Debian compiler kernel supports "large" memory.

The Debian compiling kernel supports "large" memory-the Linux Release Technology-Debian information. The following is a detailed description. Environment: Debian testing/lenny 2.6.26-1-486
Cause: the default kernel does not support large memory. If it is larger than 1 GB, it will be processed as 1 GB?
Reference: http://www.howtoforge.com/kernel_compilation_debian_etch

Details:

1. install required tools
$ Su-root
# Apt-get install kernel-package libncurses5-dev fakeroot wget bzip2 build-essential


2. Download the kernel source code
Download the required version source code to http://www.kernel.org/pub/linux/kernel/v2.6
2.6.26.5 under me
# Cd/usr/src
# Wget http://www.kernel.org/pub/linux/... ux-2.6.26.5.tar.bz2
# Tar xf linux-2.6.26.5.tar.bz2
# Cd linux-2.6.26.5
PS: refer to the patch selection mentioned in the article. I have not found any patch required yet.

3. Configure the kernel
# Make clean & make mrproper
# Cp/boot/config-2.6.26-1-486./. config (copy the current Kernel configuration and modify it on this basis)

# Make menuconfig

The. config configuration is automatically imported.
Select
Processor type and features ---> High Memory Support (4 GB)
Disabled by default.
Then exit and prompt to save.
PS: I am AMD 64x2 5000 + CPU. I tried to select the CPU family K8, but I don't know the difference.

4. Build the kernel
# Make-kpkg clean
# Fakeroot make-kpkg -- initrd -- append-to-version =-k8-4gb-memory kernel_image kernel_headers
The "-- append-to-version" parameter is the text displayed after the kernel version. It must start with "-" and then be a combination of lowercase letters and numbers.
The name of the kernel generated above is: linux-image-2.6.26.5-k8-4gb-memory

Then it took me more than 50 minutes to wait.
It can save a lot of time to get rid of unnecessary drivers.

5. Install
The deb package has been generated under/usr/src /.
# Cd/usr/src
# Dpkg-I linux-image-2.6.26.5-k8-4gb-memory_2.6.26.5-k8-4gb-memory-10.00.Custom_i386.deb
# Dpkg-I linux-headers-2.6.26.5-k8-4gb-memory_2.6.26.5-k8-4gb-memory-10.00.Custom_i386.deb

The installer automatically generates initrd and updates grub.

Restart the new kernel.