| Date | Fri, 2 Oct 2009 11:59:16 +0200 | From | Ingo Molnar <> | Subject | Re: [this_cpu_xx V4 02/20] this_cpu: X86 optimized this_cpu operations |
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* cl@linux-foundation.org <cl@linux-foundation.org> wrote:
> Basically the existing percpu ops can be used for this_cpu variants > that allow operations also on dynamically allocated percpu data. > However, we do not pass a reference to a percpu variable in. Instead a > dynamically or statically allocated percpu variable is provided. > > Preempt, the non preempt and the irqsafe operations generate the same > code. It will always be possible to have the requires per cpu > atomicness in a single RMW instruction with segment override on x86. > > 64 bit this_cpu operations are not supported on 32 bit. > > Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Ingo
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