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

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From: Olof Johansson
Subject: Re: [stable] [patch 09/12] Fix SMP poweroff hangs
Date: Tuesday, October 9, 2007 - 5:03 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, 11:05 am)
[patch 01/12] scsi_transport_spi: fix domain validation fa ..., Greg KH, (Mon Oct 8, 11:06 am)
[patch 02/12] sky2: reduce impact of watchdog timer, Greg KH, (Mon Oct 8, 11:06 am)
[patch 03/12] sky2: fix VLAN receive processing, Greg KH, (Mon Oct 8, 11:06 am)
[patch 04/12] sky2: fix transmit state on resume, Greg KH, (Mon Oct 8, 11:06 am)
[patch 05/12] libata: update drive blacklists, Greg KH, (Mon Oct 8, 11:06 am)
[patch 06/12] Fix ppp_mppe kernel stack usage., Greg KH, (Mon Oct 8, 11:06 am)
[patch 07/12] i2c-algo-bit: Read block data bugfix, Greg KH, (Mon Oct 8, 11:06 am)
[patch 08/12] NLM: Fix a circular lock dependency in lockd, Greg KH, (Mon Oct 8, 11:06 am)
[patch 09/12] Fix SMP poweroff hangs, Greg KH, (Mon Oct 8, 11:06 am)
[patch 10/12] Fix timer_stats printout of events/sec, Greg KH, (Mon Oct 8, 11:06 am)
[patch 11/12] SELinux: clear parent death signal on SID tr ..., Greg KH, (Mon Oct 8, 11:06 am)
[patch 12/12] i386: Use global flag to disable broken loca ..., Greg KH, (Mon Oct 8, 11:06 am)
Re: [patch 00/12] 2.6.22.10 -stable review, Greg KH, (Mon Oct 8, 11:09 am)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Roel Kluin, (Mon Oct 8, 1:01 pm)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Trond Myklebust, (Tue Oct 9, 8:00 am)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Greg KH, (Tue Oct 9, 8:13 am)
Re: [patch 09/12] Fix SMP poweroff hangs, Olof Johansson, (Tue Oct 9, 8:17 am)
Re: [patch 08/12] NLM: Fix a circular lock dependency in lockd, Trond Myklebust, (Tue Oct 9, 8:27 am)
Re: [stable] [patch 08/12] NLM: Fix a circular lock depend ..., Greg KH, (Tue Oct 9, 1:41 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Greg KH, (Tue Oct 9, 3:20 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Thomas Gleixner, (Tue Oct 9, 4:21 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Linus Torvalds, (Tue Oct 9, 4:27 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Greg KH, (Tue Oct 9, 4:28 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Thomas Gleixner, (Tue Oct 9, 4:35 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Olof Johansson, (Tue Oct 9, 5:03 pm)
[PATCH] powerpc: don't enable cpu hotplug on mpic-based ps ..., Olof Johansson, (Tue Oct 9, 5:08 pm)
Re: [PATCH] powerpc: don't enable cpu hotplug on mpic-base ..., Stephen Rothwell, (Tue Oct 9, 5:18 pm)
[PATCH v2] powerpc: don't enable cpu hotplug on mpic-based ..., Olof Johansson, (Tue Oct 9, 5:38 pm)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Linus Torvalds, (Tue Oct 9, 10:29 pm)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-b ..., Milton Miller, (Wed Oct 10, 3:08 am)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-b ..., Olof Johansson, (Wed Oct 10, 9:43 am)
Re: [stable] [patch 09/12] Fix SMP poweroff hangs, Paul Mackerras, (Wed Oct 10, 5:24 pm)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-b ..., Paul Mackerras, (Wed Oct 10, 10:52 pm)
Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-b ..., Olof Johansson, (Wed Oct 10, 10:59 pm)