Re: [this_cpu_xx V4 00/20] Introduce per cpu atomic operations andavoid per cpu address arithmetic

[Christoph Lameter]

On Fri, 2 Oct 2009, Ingo Molnar wrote:

> One final step/cleanup seems to be missing from it: it should replace
> current uses of percpu_op() [percpu_read(), etc.] in the x86 tree and
> elsewhere with the new this_cpu_*() primitives. this_cpu_*() is using
> per_cpu_from_op/per_cpu_to_op directly, we dont need those percpu_op()
> variants anymore.

Well after things settle with this_cpu_xx we can drop those.

> There should also be a kernel image size comparison done for that step,
> to make sure all the new primitives are optimized to the max on the
> instruction level.

Right. There will be a time period in which other arches will need to add
support for this_cpu_xx first.


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