Re: [PATCH V2] task_work: avoid unneeded cmpxchg() intask_work_run()

[Peter Zijlstra]

On Wed, 2012-10-10 at 19:50 +0200, Oleg Nesterov wrote:
> 
> But you did not answer, and I am curious. What was your original
> motivation? Is xchg really faster than cmpxchg? 

And is this true over multiple architectures? Or are we optimizing for
x86_64 (again) ?
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