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

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Message-Id: <1174515853.5477.18.camel@localhost.localdomain>
Date:	Wed, 21 Mar 2007 15:24:12 -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
Subject: Re: [BUG] no boot with 2.6.21-rc3 and later

On Wed, 2007-03-21 at 16:00 -0600, Bob Tracy wrote:
> john stultz wrote:
> > Hmmm. Are you able to capture a full dmesg?
> 
> For the "it hangs" case, short of either trying to boot with the
> console I/O redirected to a serial port or hooking up a printer to
> the console and scanning in the resulting output, I don't think so.
> There's too much output prior to the hang point to make manual
> transcription feasible.

Hmm. You could give netconsole a try(see
Documentation/networking/netconsole.txt), although if the hang is before
that inits you might be out of luck.

> > Also, does booting w/ "clocksource=jiffies" change the behavior?
> 
> I'll build a post-"bad"-commit kernel later this evening and let you
> know.  Unfortunately, real life has to intrude for a few hours :-).

No problem. When you can get to it. :)

Also trying booting w/ "notsc" would be a useful data point.

> If specifying the clocksource allows for a normal bootup, would you
> like to see the corresponding dmesg output?

No, although a pre-bad-commit dmesg would help.

thanks
-john

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