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From: Paul Mackerras <paulus@samba.org>
To: Mel Gorman <mel@csn.ul.ie>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
benh@kernel.crashing.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linuxppc-dev@ozlabs.org
Subject: Re: 2.6.28-rc1: NVRAM being corrupted on ppc64 preventing boot (bisected)
Date: Fri, 31 Oct 2008 07:52:02 +1100 [thread overview]
Message-ID: <18698.7794.500191.189515@cargo.ozlabs.ibm.com> (raw)
In-Reply-To: <20081030142632.GA15645@csn.ul.ie>
Mel Gorman writes:
> On some ppc64 machines, NVRAM is being corrupted very early in boot (before
> console is initialised). The machine reboots and then fails to find yaboot
> printing the error "PReP-BOOT: Unable to load PRep image". It's nowhere near
> as serious as the ftrace+e1000 problem as the machine is not bricked but it's
> fairly scary looking, the machine cannot boot and the fix is non-obvious. To
> "fix" the machine;
>
> 1. Go to OpenFirmware prompt
> 2. type dev nvram
> 3. type wipe-nvram
>
> The machine will reboot, reconstruct the NVRAM using some magic and yaboot
> work again allowing an older kernel to be used. I bisected the problem down
> to this commit.
Eek!
Which ppc64 machines has this been seen on, and how were they being
booted (netboot, yaboot, etc.)?
Is it just the Powerstations with their SLOF-based firmware, or is it
IBM pSeries machines as well?
Paul.
next prev parent reply other threads:[~2008-10-30 20:52 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-24 4:10 Linux 2.6.28-rc1 Linus Torvalds
2008-10-24 4:14 ` Roland Dreier
2008-10-24 18:08 ` Greg KH
2008-10-24 11:24 ` Alistair John Strachan
2008-10-24 11:45 ` Rafael J. Wysocki
2008-10-24 12:52 ` Alistair John Strachan
2008-10-24 13:13 ` Alexey Dobriyan
2008-10-24 14:56 ` git-clean [Was: Linux 2.6.28-rc1] Björn Steinbrink
2008-10-24 15:17 ` Linux 2.6.28-rc1 Linus Torvalds
2008-10-24 19:22 ` Sam Ravnborg
2008-10-24 22:31 ` David Miller
2008-10-24 22:51 ` Sam Ravnborg
2008-10-24 19:15 ` Sam Ravnborg
2008-10-24 23:44 ` Alistair John Strachan
2008-10-24 17:09 ` Matt Mackall
2008-10-24 17:54 ` Matt Mackall
2008-10-24 17:57 ` Randy Dunlap
2008-10-24 18:05 ` Fenghua Yu
2008-10-24 18:11 ` Matt Mackall
2008-10-24 22:28 ` nf_conntrack oopes on parisc/smp (was Re: Linux 2.6.28-rc1) Domenico Andreoli
2008-10-24 22:53 ` Linux 2.6.28-rc1 Tony Vroon
2008-10-24 23:01 ` Arjan van de Ven
2008-10-26 13:17 ` Tony Vroon
2008-10-30 14:26 ` 2.6.28-rc1: NVRAM being corrupted on ppc64 preventing boot (bisected) Mel Gorman
2008-10-30 20:52 ` Paul Mackerras [this message]
2008-10-30 21:05 ` Josh Boyer
2008-10-30 21:35 ` Dave Kleikamp
2008-10-31 10:36 ` Mel Gorman
2008-10-31 11:10 ` Paul Mackerras
2008-10-31 11:31 ` Mel Gorman
2008-10-31 18:36 ` Mel Gorman
2008-10-31 11:18 ` Paul Mackerras
2008-10-31 11:31 ` Benjamin Herrenschmidt
2008-10-31 11:56 ` Paul Mackerras
2008-10-31 11:32 ` Mel Gorman
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