RE: Re: K7 & cpu disconnect

["Thomas Herrmann" <ollo.diab-Mmb7MZpHnFY@public.gmane.org>]

> > Hi Len,
> > 
> > one more data point wrt this topic.
> > I can enable STPGNT/CPU disconnect on my NForce2 system 
> > running WinXP while
> > using the tool from http://www.hasw.net/8rdavcore. And guess 
> > what, the system
> > runs stable for hours, not locking-up at all. Since this is 
> > exactly the same
> > hardware as well as BIOS configuration, it leads me to 
> > beleave the Linux
> > ACPI/IO_APIC implementation has an issue.
> 
> If the ACPI/IO APIC code has a problem, you should be able to cause the
> problem while not enabling the out-of-spec feature. I think you should
> feel free to run whatever stress test you can think of, but if the fault
> only occurs when you are out of spec, then in my opinion it is asking a
> lot to ask people to devote time towards fixing it.
> 
> Regards -- Andy
> 
Hi Andy,

is this realy an out-of-spec feature? I mean STPGNT is documented by AMD and
the K7 Barton Core does requests it as a platform/BIOS option.

I just wanted to make aware of an (potential) timing issue in the interrupt
response mechanism of the current ACPI/IO_APIC implementation. The patches
Ross Dickson has posted on the LKML due support this IMHO. Might be it occures
in different scenarios too. Maybe not today, maybe in the future ,who knows.

I'm not asking for a personal favor here. I think you guys have done a great
job getting interrupt routing working fine on the NForce2 & SiS740 platform.

Regards,    Thomas

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