linux-kernel - Re: 2.6.23-rc4-mm1 and -rc6-mm1: boot failure on HP nx6325, related to clockevents

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Date:	Tue, 25 Sep 2007 23:24:53 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Andi Kleen <ak@...e.de>, Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.23-rc4-mm1 and -rc6-mm1: boot failure on HP nx6325,
	related to clockevents

Rafael,

On Tue, 2007-09-25 at 23:28 +0200, Rafael J. Wysocki wrote:
> > I'm a bit confused by your earlier confirmation, that mainline w/o the
> > -hrt patches boots fine, when you add "apicmaintimer" to the kernel
> > command line. "apicmaintimer" stops the PIT like we do in -hrt and we
> > just use the local APIC timer for everything. Can you please retest and
> > confirm that this is correct ?
> 
> No, it's not.  The mainline _usually_ doesn't boot with "apicmaintimer".
> 
> It seems to me that _sometimes_ the CPU just doesn't enter this C1E state
> and then everything goes fine ...

I'm relieved. I really started to go nuts on this contradicting
patterns.

Your box seems to be worse than the VAIO, it has some random surprise
generator built in :)

> > Is the 32 bit kernel working on that box ?
> 
> Can't tell, I have only 64-bit userland here.

Should be fine. The check is there since late 2.6.21-rc. I really could
kick my own ass that I did not remember the nx6325 wreckage in the
2.6.21-rc time frame. Sigh, way too much broken hardware out there to
keep track of it.

> > Thanks for your patience.
> 
> Well, I'm only making sure that future kernels will run on my box. ;-)

Nothing wrong with that. Thanks again for your help,

	tglx


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