Re: [RFC 00/15] x86_64: Optimize percpu accesses

[H. Peter Anvin]

Christoph Lameter wrote:
> Mike Travis wrote:
>
> > I think Jeremy's point is that by removing the pda struct entirely, the
> > references to the fields can be the same for both x86_32 and x86_64.
>
> That is going to be difficult. The GS register is tied up for the pda area
> as long as you have it. And you cannot get rid of the pda because of the library
> compatibility issues. We would break binary compatibility if we would get rid of the pda.

We're talking about the kernel here... who gives a hoot about binary 
compatibility?

	-hpa

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