Re: Why preallocate pmd in x86 32-bit PAE?
From: H. Peter Anvin
Date: Fri Nov 16 2007 - 10:46:36 EST
Andi Kleen wrote:
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.
Well, three with the kernel.
-hpa
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