linux-kernel - Re: [BUG] no boot with 2.6.21-rc3 and later

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Message-Id: <1174593402.5662.10.camel@localhost.localdomain>
Date:	Thu, 22 Mar 2007 12:56:42 -0700
From:	john stultz <johnstul@...ibm.com>
To:	Bob Tracy <rct@...rkin.frus.com>
Cc:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-kernel@...r.kernel.org, bunk@...sta.de, jikos@...os.cz,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [BUG] no boot with 2.6.21-rc3 and later

On Thu, 2007-03-22 at 13:39 -0600, Bob Tracy wrote:
> john stultz wrote:
> > On Thu, 2007-03-22 at 13:14 -0600, Bob Tracy wrote:
> > > john stultz wrote:
> > > > Try this patch and let me know if it does the right thing.
> > > 
> > > Will do.  I'll report back in a few hours.
> > > 
> > > > Although I do
> > > > still need to dig a bit on the PIT hang issue.
> > > 
> > > Any chance this might be related to the APIC issues currently being
> > > discussed in other threads?
> > 
> > Hmmm. Good thought, I'll have to look into it. It could be that if the
> > PIT is disabled in favor of the local apic, we'll have to make sure its
> > not being used as a clocksource.
> 
> According to the dmesg output, the local apic is disabled in the BIOS on
> this system, and I'm not booting with "lapic" to enable it.
> 
> Anyway, the "few hours" turned out to be more like a few minutes :-).
> The patch worked as far as selecting/installing the acpi_pm clocksource
> instead of the pit clocksource, and there was no hang during boot.  If
> you would like to see the dmesg output, let me know and I'll forward it
> to you in a separate message.

Great to hear! Please do send me the dmesg output so I can look to
narrow down what's happening w/ the PIT.

I'll also go ahead and push that acpi_pm change to akpm.

thanks
-john


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