On Friday 16 November 2007 16:45:16 H. Peter Anvin wrote:Andi Kleen wrote:Well, three with the kernel.I think Jeremy's question was due to trying to reduce the 32/64-bit differences. Performance-wise, it might add a small amount to user setup time (a typical 32-bit process will need all four, for the main binary, libraries, stack and kernel, respectively)With the new top down mmap layout and standard 3:1 split it should typically only need two.
I didn't count kernel because it is always fixed anyways and about zero
overhead for the normal setup case.