Re: [PATCH] x86: mtrr: don't modify RdDram/WrDram bits of fixed MTRRs

Andreas Herrmann
2009-03-12T12:54:18Z

On Thu, Mar 12, 2009 at 02:29:02PM +0200, Maxim Levitsky wrote:
> On Thu, 2009-03-12 at 12:41 +0100, Andreas Herrmann wrote:
> > (Causing Suspend/resume problem:)
> > - Acer Ferrari 1000
> > - Acer Ferrari 5000

> What problem?
> Hang second resume???

See

http://lkml.org/lkml/2007/4/3/110

I don't have access to such a machine. Thus I don't know
what the exact problem was.

But it was the reason that the code to sync RdMem/WrMem bits of
fixed-MTRRs on AMD-CPUs was added. And now this caused new problems on
systems with other buggy BIOSes.

Regards,

Andreas

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