PAE kernel

Enable PAE on Backtrack5 R2 & R3

NOTE: Do not change any other settings in your kernel unless you know exactly what you are doing!

• In this tutorial we will proceed to enable PAE on Backtrack5 R2.

• We first prepare our kernel and enter the kernel menuconfig.

root@bt:~# prepare-kernel-sources
root@bt:/usr/src/linux# zcat /proc/config.gz > .config
root@bt:/usr/src/linux# make menuconfig

• After we have launched the ncurses menuconfig we proceed in enabling PAE which can be found at the following: Processor type and features -> High Memory Support(4) --> 64GB

• Once we have enabled PAE from the menuconfig we proceed into building our kernel.

root@bt:/usr/src/linux# make scripts
root@bt:/usr/src/linux# make prepare
root@bt:/usr/src/linux# make
root@bt:/usr/src/linux# update-initramfs -u
root@bt:~# update-grub2

• We than reboot and check to see if PAE is enabled. (Adjust the path to your running kernel)

root@bt:~# cat /boot/config-3.2.6 | grep HIGHMEM</span
# CONFIG_HIGHMEM64G is not set
CONFIG_HIGHMEM=y