Re: [PATCH] use unfair spinlock when running on hypervisor.

[H. Peter Anvin]

On 06/01/2010 10:39 AM, Valdis.Kletnieks@xxxxxx wrote:
> On Tue, 01 Jun 2010 19:52:28 +0300, Avi Kivity said:
> > On 06/01/2010 07:38 PM, Andi Kleen wrote:
> > > > > Your new code would starve again, right?
> > > Try it on a NUMA system with unfair memory.
>
> > We are running everything on NUMA (since all modern machines are now
> > NUMA).  At what scale do the issues become observable?
>
> My 6-month-old laptop is NUMA? Comes as a surprise to me, and to the
> perfectly-running NUMA=n kernel I'm running.
>
> Or did you mean a less broad phrase than "all modern machines"?

All modern multisocket machines, unless configured in interleaved memory 
mode.

	-hpa

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