On Mon, Dec 14, 2009 at 05:34:13AM -0800, Anoop P.A. wrote: > We have a requirement to use a bigger RAM (1 GB / 2GB) with a RM9000 > based SOC. I thought of going with HIGHMEM path rather than enabling > 64bit support thinking it will be easier. This sounds like sawing off 32 legs just to be able to make use of a free [1] wheelchair. > I have tried enabling HIGMEM in kernel. Board boots fine with a 512 MB > RAM plugged in. But if I connect a 1 GB RAM kernel will not boot. I am > not even getting single print from kernel. I am using linux-2.6.18 > kernel. > > It will be great if get any pointers suggestions in debugging this? With this amount of RAM, use a 64-bit kernel if you can. You'll be happy not to know about all the headaches you will never encounter. Ralf [1] Conditions apply.