Re: [PATCH V2] task_work: avoid unneeded cmpxchg() intask_work_run()
From: Peter Zijlstra
Date: Wed Oct 10 2012 - 13:51:04 EST
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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