I was recompiling the kernel on one of my linux boxen and I noticed this after a recompile.
Warning only 896MB will be used.
Use a HIGHMEM enabled kernel.
896MB LOWMEM available.
Seeing as the machine has 1gb of ram, I was a little puzzled. It seems obvious enough, but I always thought that a HIGH MEM enabled kernel was for 2gb plus (as the options are 4gb or 64gb) but apparently, it is for anything 896mb+
Weird number, cbf’d researchng it.
(The option is under Processor Features -> Hign Memory in the 2.6(.15) kernel)