hi,

I have a few questions I couldn't quite get a handle on it ...

- what is it exactly when people talk about kernel address space? is it physical or virtual, does it refer to the 1G (low memory)?

- I read that user process's virtual address space (32 bit arch) was split 1G/3G, where kernel takes the 1G, and user process takes the 3G. why the 1G/3G split? why can't user process think the whole 4G is its own?

TIA,

oliver