Re: [PATCH] 2.6, 2.4, Nforce2, Experimental idle halt workaroundinstead of apic ack delay.
From: Derek Foreman
Date: Thu Feb 12 2004 - 14:55:21 EST
On Thu, 12 Feb 2004, Daniel Drake wrote:
> Derek Foreman wrote:
> > Is there a measurable performance loss over not having the patch at all?
> > Some nforce2 systems work just fine. Is there a way to distinguish
> > between systems that need it and those that don't?
> Do you have one of those systems to hand? My betting is on that when you
> enable APIC/IOAPIC you will see crashes very frequently. This isn't enabled in
> the default kernel config..
APIC, ACPI, IOAPIC, enabled or disabled.. lots of different kernels
soltek frn2 nforce2 based board, barton XP 2500+, 512mb ddr
Bios doesn't allow disabling of stop grant, but I've tried both states
It's really entering the stop grant state, because when completely idle it
makes a measurable heat difference. (though when playing mp3s, almost all
of the cooling benefit is lost)
This machine hasn't crashed yet.
If there's something I can do to crash it so I don't feel special
anymore, or if there's some way I can provide useful information, let me
> PS, Ross: Again, great work, thanks. I am running the patches you posted in
> the thread starter (without the previous ones) on 2.6.3-rc2-mm1 without problem.
I hope my email wasn't interpreted as an attack on the patch. I think
getting linux running on flakey hardware without any support at all from
the manufacturer is incredibly cool.
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