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SubjectRe: [patch 5/7] x86_64: Support for cpu ops

* Christoph Lameter <> 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.


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