Re: [PATCH 1/10] Cr4 is valid on some 486s

[Arjan van de Ven]

On Sun, 2005-11-13 at 21:32 +0000, Alan Cox wrote:
> On Sul, 2005-11-13 at 11:36 -0800, Linus Torvalds wrote:
> > The thing is, we wouldn't ever remove _all_ lock prefixes. Only the ones 
> > that already depend on SMP.
> > 
> > So the memory barriers etc that have lock prefixes even on UP would be 
> > totally untouched.
> 
> That much makes sense. Having some magic MSR reloaded to turn lock
> effects off is a bit more of a problem for ECC scrubbing however.

well... you can expect many bioses to have done the MSR hack for you
already... so if you can't cope with that you have to set the MSR to the
value you want it to have regardless.


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