Which kernal are you using:
kernel-smp can use >4GB by using PAE (3 level paging w/ indirect pointers at kernel level to higher mem)
kernel-hugemem uses 4/4 split: 4GB addrees space for system/kernel, 4GB address space per user process
There's at least one install I know of where they installed on 6GB ram machines. I guess we could put in some limitss so the math doesn't ever try to give more that 2GB to any process. |