Re: Bugs aren't features: X86_FEATURE_FXSAVE_LEAK

[Christer Weinigel]

Andi Kleen <ak@xxxxxxx> writes:

> "H. Peter Anvin" <hpa@xxxxxxxxx> writes:
> 
> > The recent fix for the AMD FXSAVE information leak had a problematic
> > side effect.  It introduced an entry in the x86 features vector which
> > is a bug, not a feature.
> 
> It's a non issue because it affects all AMD CPUs (except K5/K6).
> You'll never find a system where only some CPUs have this problem.

I have a dual CPU system (Tyan Tomcat 1564D) where only one CPU is
reported to have the F00F bug (iirc).  So yes, there can be
SMP-systems where the CPU's have different bugs.

    /Christer

-- 
"Just how much can I get away with and still go to heaven?"

Freelance consultant specializing in device driver programming for Linux 
Christer Weinigel <christer@xxxxxxxxxxx>  http://www.weinigel.se
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