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Re: [stable] [patch 09/12] Fix SMP poweroff hangs

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From: Olof Johansson <olof@...>
To: Linus Torvalds <torvalds@...>
Cc: Thomas Gleixner <tglx@...>, Greg KH <greg@...>, Greg KH <gregkh@...>, Rafael J. Wysocki <rjw@...>, Theodore Ts'o <tytso@...>, Zwane Mwaikambo <zwane@...>, Justin Forbes <jmforbes@...>, <linux-kernel@...>, Chris Wedgwood <reviews@...>, Domenico Andreoli <cavokz@...>, Mark Lord <mlord@...>, Randy Dunlap <rdunlap@...>, Michael Krufky <mkrufky@...>, Chuck Ebbert <cebbert@...>, Dave Jones <davej@...>, <akpm@...>, Chuck Wolber <chuckw@...>, <stable@...>, <alan@...>, <linuxppc-dev@...>
Subject: Re: [stable] [patch 09/12] Fix SMP poweroff hangs
Date: Tuesday, October 9, 2007 - 8:03 pm

On Tue, Oct 09, 2007 at 04:27:06PM -0700, Linus Torvalds wrote:

The machine Paul tried on most likely has MPIC interrupt controller, and
the oops was when the pseries_cpu_disable tried calling XICS code instead.
It's not surprising that it failed, I don't think IBM has (traditionally)
cared about cpu hotplug on those machines.

So the PPC-side fix is to not enable cpu hotplug on mpic-based
systems. I'll follow up with a patch, but I have no way to test it since
I only have one POWER5 machine, no other IBM hardware. I'd appreciate
it if someone with hardware could verify it.


-Olof
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Messages in current thread:
[patch 00/12] 2.6.22.10 -stable review, Greg KH, (Mon Oct 8, 2:05 pm)
Re: [patch 00/12] 2.6.22.10 -stable review, Greg KH, (Mon Oct 8, 2:09 pm)
[patch 12/12] i386: Use global flag to disable broken local ..., Greg KH, (Mon Oct 8, 2:06 pm)
[patch 11/12] SELinux: clear parent death signal on SID tran..., Greg KH, (Mon Oct 8, 2:06 pm)
[patch 10/12] Fix timer_stats printout of events/sec, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 09/12] Fix SMP poweroff hangs, Greg KH, (Mon Oct 8, 2:06 pm)
Re: [patch 09/12] Fix SMP poweroff hangs, Olof Johansson, (Tue Oct 9, 11:17 am)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Greg KH, (Tue Oct 9, 6:20 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Thomas Gleixner, (Tue Oct 9, 7:21 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Greg KH, (Tue Oct 9, 7:28 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Linus Torvalds, (Tue Oct 9, 7:27 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Paul Mackerras, (Wed Oct 10, 8:24 pm)
[PATCH] powerpc: don't enable cpu hotplug on mpic-based pser..., Olof Johansson, (Tue Oct 9, 8:08 pm)
Re: [PATCH] powerpc: don't enable cpu hotplug on mpic-based ..., Stephen Rothwell, (Tue Oct 9, 8:18 pm)
[PATCH v2] powerpc: don't enable cpu hotplug on mpic-based p..., Olof Johansson, (Tue Oct 9, 8:38 pm)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-bas..., Paul Mackerras, (Thu Oct 11, 1:52 am)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-bas..., Olof Johansson, (Thu Oct 11, 1:59 am)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-bas..., Milton Miller, (Wed Oct 10, 6:08 am)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-bas..., Olof Johansson, (Wed Oct 10, 12:43 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Olof Johansson, (Tue Oct 9, 8:03 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Thomas Gleixner, (Tue Oct 9, 7:35 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Linus Torvalds, (Wed Oct 10, 1:29 am)
[patch 08/12] NLM: Fix a circular lock dependency in lockd, Greg KH, (Mon Oct 8, 2:06 pm)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Roel Kluin, (Mon Oct 8, 4:01 pm)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Trond Myklebust, (Tue Oct 9, 11:00 am)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Greg KH, (Tue Oct 9, 11:13 am)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Trond Myklebust, (Tue Oct 9, 11:27 am)
Re: [stable] [patch 08/12] NLM: Fix a circular lock dependen..., Greg KH, (Tue Oct 9, 4:41 pm)
[patch 07/12] i2c-algo-bit: Read block data bugfix, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 06/12] Fix ppp_mppe kernel stack usage., Greg KH, (Mon Oct 8, 2:06 pm)
[patch 05/12] libata: update drive blacklists, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 04/12] sky2: fix transmit state on resume, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 03/12] sky2: fix VLAN receive processing, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 02/12] sky2: reduce impact of watchdog timer, Greg KH, (Mon Oct 8, 2:06 pm)
[patch 01/12] scsi_transport_spi: fix domain validation fail..., Greg KH, (Mon Oct 8, 2:06 pm)