| | Date | Fri, 02 Oct 2009 18:18:42 +0900 | | From | Tejun Heo <> | | Subject | Re: [this_cpu_xx V4 02/20] this_cpu: X86 optimized this_cpu operations |
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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: Tejun Heo <tj@kernel.org>
-- tejun
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