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Date: Tue, 17 Dec 2002 01:03:21 +0000
From: Dave Jones <davej@codemonkey.org.uk>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org
Subject: Re: Intel P6 vs P7 system call performance
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On Mon, Dec 16, 2002 at 04:47:00PM -0800, Linus Torvalds wrote:

Cool, new toys 8-) I'll have a play with this tomorrow.
after a quick glance, one thing jumped out at me.

 > +static int __init sysenter_setup(void)
 > +{
 > +	if (!boot_cpu_has(X86_FEATURE_SEP))
 > +		return 0;
 > +
 > +	enable_sep_cpu(NULL);
 > +	smp_call_function(enable_sep_cpu, NULL, 1, 1);
 > +	return 0;

I'm sure I recall seeing errata on at least 1 CPU re sysenter.
If we do decide to go this route, we'll need to blacklist ones
with any really icky problems.

		Dave

-- 
| Dave Jones.        http://www.codemonkey.org.uk
| SuSE Labs
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