Re: Why preallocate pmd in x86 32-bit PAE?

[H. Peter Anvin]

Andi Kleen wrote:
> On Friday 16 November 2007 16:45:16 H. Peter Anvin wrote:
> > 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.
>
> I didn't count kernel because it is always fixed anyways and about zero
> overhead for the normal setup case.

Of course, but it was in the original list so...

	-hpa
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