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List:       linux-kernel
Subject:    Re: [Bug 350] New: i386 context switch very slow compared to 2.4 due to wrmsr (performance)
From:       Dave Jones <davej () codemonkey ! org ! uk>
Date:       2003-02-12 18:13:46
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On Wed, Feb 12, 2003 at 06:52:00PM +0100, Ingo Oeser wrote:
 > On Wed, Feb 12, 2003 at 11:45:08AM +0100, Andi Kleen wrote:
 > > [...] I have no real interest in vm86 mode, perhaps one of the people
 > > interested in dosemu etc. could take care of it. I'm very glad it doesn't
 > > exist on my main architecture - x86-64 - given how many hacks it needs to be 
 > > supported.
 > 
 > So what about making it a CONFIG_XXX option? The few dosemu users
 > could then configure it in.

Overkill. Andi's TF_VM86 fix looks to be the nicest way to do it.
If you don't use dosemu etc, the wrmsr should never be hit.

		Dave

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