Re: [PATCH] arch,locking: Ciao arch_mutex_cpu_relax()

From: Heiko Carstens
Date: Wed Jun 25 2014 - 02:25:24 EST


On Tue, Jun 24, 2014 at 08:06:55AM -0700, Davidlohr Bueso wrote:
> On Mon, 2014-06-23 at 08:58 +0200, Peter Zijlstra wrote:
> > While I like the general idea; does anyone have a better name for this?
> > So in particular, the difference is that on s390:
> >
> > cpu_relax() - yields the vcpu
> > arch_{,mutex_}cpu_relax() - will actually spin-wait
>
> iirc Heiko had suggested cpu_relax_simple() in the past. I don't think
> it's any better or worse than arch_cpu_relax(). For s390
> cpu_relax_noyield() would perhaps be suitable, but not very descriptive
> for the rest of the archs. I'm really lacking creativity for this name.

Maybe cpu_relax_spin() ? However that doesn't sound much better as well.

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