Re: [Bug 350] New: i386 context switch very slow compared to 2.4 due to wrmsr (performance)

From: Alan Cox (
Date: Wed Feb 12 2003 - 21:42:07 EST

On Wed, 2003-02-12 at 18:18, Andi Kleen wrote:
> > So what about making it a CONFIG_XXX option? The few dosemu users
> > could then configure it in.
> Doesn't help for precompiled distribution kernels, which is what the majority
> of linux users run these days.

XFree86 makes significant use of it, and its software x86 emulator isn't up to
replacing it on many cards (eg my C&T only works with vm86 not the emulator).
Obviously on x864-64 you have little choice, but for x86-32 its somewhat

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