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Date: Tue, 3 Dec 2002 12:21:23 -0500 (EST)
From: "Calin A. Culianu" <calin@ajvar.org>
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To: Arjan van de Ven <arjanv@redhat.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: SMP Pentium4 -- PAUSE Instruction
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:)  Oh.  Don't I feel like I hit the panic button too early... :/

-Calin

On 3 Dec 2002, Arjan van de Ven wrote:

> On Tue, 2002-12-03 at 16:42, Calin A. Culianu wrote:
>
> > Is this instruction being used in spin-wait loops?  For some reason, I am
> > having a hard time figuring out whether or not it is being used.  There is
> > a rep_nop() in processor.h.. but I can't determine if that is being called
> > for spin lock lock/unlock code.
>
> check cpu_relax() all over the kernel :)
> and the spinlock code uses it inside it's own asm directly, not via
> rep_nop()
>
>

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