linux-kernel - Re: Linux v2.6.18-rc5

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Message-ID: <20060828061302.GA45823@muc.de>
Date:	Mon, 28 Aug 2006 08:13:02 +0200
From:	Andi Kleen <ak@....de>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	Marc Perkel <marc@...kel.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	ACurrid@...dia.com, len.brown@...el.com
Subject: Re: Linux v2.6.18-rc5

On Sun, Aug 27, 2006 at 10:52:06PM -0700, Linus Torvalds wrote:
> 
> 
> On Sun, 27 Aug 2006, Marc Perkel wrote:
> >
> > You might want to look at this bug.
> > 
> > http://bugzilla.kernel.org/show_bug.cgi?id=6975
> > 
> > The current kernel doesn't run on Asus Motherboards that use the new AM2 CPUs.

That sounds like a overly broad statement. How do you know
it affects all Asus boards and not just your specific BIO version?

> > Should this be addressed before 2.6.18 is finished?
> 
> Hmm. Can you verify that the system boots fine if you get rid of 
> acpi_skip_timer_override as per the hint from Prakash Punnoor?

We already should disable it on NF5 automatically. Timer override was all
broken on NF3/NF4, but apparently works on NF5 again.

But the check relies on HPET being present. Maybe Asus "forgot"
to set up the HPET table again and the test fails.

[In general Asus BIOS writers seems to have issues. They completely
broke all the MCFG tables too]

I can't say from the URL above if it's that because it's missing a complete
boot log. Marc, please add that.

Andy, I guess the timer override check just needs to be tightened to check
the specific PCI IDs of NF3/NF4 only and not rely on HPET being right. 
Do you have a list of them?

I suppose we also need a no_acpi_skip_override setup option for future
cases.

> 
> Andi? You were talking about how the 64-bit machines don't have some of 
> the cruft that the old PC's have.. It looks like they are accumulating 
> _more_ cruft than regular x86 ever had...

Just by logic it's impossible because all 64bit systems are regular
PCs too @)

Anyways, there is cruft, but it is new cruft replacing the old cruft,
so overall there is less cruft.

-Andi

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