Originally Posted by tebokkel
Check if you have CONFIG_HIGHMEM=y in your config. A backup of config is usually saved in /boot or from the running kernel in /proc/config.gz.
Check HighFree in /proc/meminfo, check bootlog for grep highmem..
Looks like its all there
# CONFIG_NOHIGHMEM is not set
# CONFIG_HIGHMEM64G is not set
Here are the values for HIGHFREE and HIGHTotal
HighTotal: 1153424 kB
HighFree: 901096 kB