Messages in this thread | | | Date | Thu, 6 Nov 2008 08:12:06 +0100 | From | Ingo Molnar <> | Subject | Re: [patch 5/7] x86_64: Support for cpu ops |
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* Christoph Lameter <cl@linux-foundation.org> wrote:
> +# > +# X86_64's spare segment register points to the PDA instead of the per > +# cpu area. Therefore x86_64 is not able to generate atomic vs. interrupt > +# per cpu instructions. > +# > +config HAVE_CPU_OPS > + def_bool y > + depends on X86_32 > +
hm, what happened to the rebase-PDA-to-percpu-area optimization patches you guys were working on? I remember there was some binutils flakiness - weird crashes and things like that. Did you ever manage to stabilize it? It would be sad if only 32-bit could take advantage of the optimized ops.
Ingo
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