From: Arjan van de Ven <arjanv@redhat.com>
To: "Calin A. Culianu" <calin@ajvar.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: SMP Pentium4 -- PAUSE Instruction
Date: 03 Dec 2002 17:06:16 +0100 [thread overview]
Message-ID: <1038931576.20262.0.camel@laptop.fenrus.com> (raw)
In-Reply-To: <Pine.LNX.4.33L2.0212031029580.1780-100000@rtlab.med.cornell.edu>
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()
next prev parent reply other threads:[~2002-12-03 15:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-03 15:42 Calin A. Culianu
2002-12-03 15:55 ` Dave Jones
2002-12-03 16:06 ` Arjan van de Ven [this message]
2002-12-03 17:21 ` Calin A. Culianu
2002-12-03 15:57 Nakajima, Jun
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