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From: Ingo Molnar <mingo@elte.hu>
To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>,
	"Rafael J. Wysocki" <rjw@sisk.pl>,
	Thomas Gleixner <tglx@linutronix.de>,
	H Peter Anvin <hpa@zytor.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Tony Luck <tony.luck@intel.com>,
	Arjan van de Ven <arjan.van.de.ven@intel.com>,
	Suresh B Siddha <suresh.b.siddha@intel.com>,
	Len Brown <len.brown@intel.com>,
	Randy Dunlap <rdunlap@xenotime.net>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	Peter Zijlstra <peterz@infradead.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-pm <linux-pm@vger.kernel.org>, x86 <x86@kernel.org>,
	Tejun Heo <tj@kernel.org>, Borislav Petkov <bp@amd64.org>,
	"Herrmann3, Andreas" <Andreas.Herrmann3@amd.com>
Subject: Re: [PATCH v4 0/7] x86: BSP or CPU0 online/offline
Date: Tue, 6 Dec 2011 11:35:00 +0100	[thread overview]
Message-ID: <20111206103500.GD15966@elte.hu> (raw)
In-Reply-To: <4EDDE5D0.7030906@linux.vnet.ibm.com>


* Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> wrote:

> > But the hibernation angle should be considered. Hibernation 
> > already has to deal with the case where someone physically 
> > unplugs a CPU and then resumes from the disk image, right? 
> > How does the hibernation code handle that case currently?
> 
> Oh, wait a minute. Are we talking about physical CPU Hotplug 
> in between hibernation and restore? AFAIK, currently we don't 
> handle that at all. [...]

Well, not hotplug, but plain old-fashioned: 'hibernate the box, 
take out a CPU physically and thaw' kind of hardware change.

How will the hibernation code handle this case?

Thanks,

	Ingo

  reply	other threads:[~2011-12-06 10:36 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-12  5:26 [PATCH v4 0/7] x86: BSP or CPU0 online/offline Fenghua Yu
2011-11-12  5:26 ` [PATCH v4 1/7] x86/topology.c: Support functions for BSP online/offline Fenghua Yu
2011-11-12  5:26 ` [PATCH v4 2/7] x86/common.c: Init BSP data during BSP online Fenghua Yu
2011-11-12  5:26 ` [PATCH v4 3/7] x86/mtrr/main.c: Ask the first online CPU to save mtrr Fenghua Yu
2011-11-12  5:26 ` [PATCH v4 4/7] x86/smpboot.c: Don't offline BSP if any irq can not be migrated out of it Fenghua Yu
2011-11-12  5:26 ` [PATCH v4 5/7] Documentations/cpu-hotplug.tx, kernel-parameters.txt: Add x86 CPU0 online/offline feature Fenghua Yu
2011-11-12  5:26 ` [PATCH v4 6/7] x86/i387.c: Thread xstate is initialized only on BSP once Fenghua Yu
2011-11-13 15:17   ` Brian Gerst
2011-11-12  5:26 ` [PATCH v4 7/7] x86/power/cpu.c: Don't hibernate/suspend if CPU0 is offline Fenghua Yu
2011-12-06  8:42 ` [PATCH v4 0/7] x86: BSP or CPU0 online/offline Ingo Molnar
2011-12-06  8:58   ` Ingo Molnar
2011-12-06  9:52     ` Srivatsa S. Bhat
2011-12-06 10:35       ` Ingo Molnar [this message]
2011-12-06 10:47         ` Srivatsa S. Bhat
2011-12-06 11:25           ` Srivatsa S. Bhat
2011-12-06 13:03             ` Borislav Petkov
2011-12-06 13:52               ` Ingo Molnar
2011-12-07  0:04                 ` Yu, Fenghua
2011-12-07  0:15               ` Yu, Fenghua
2011-12-07  7:40                 ` Ingo Molnar
2011-12-07 17:08                   ` Luck, Tony
2011-12-07 22:21                     ` Ingo Molnar
2011-12-08  0:53                       ` Luck, Tony
2011-12-08  4:43                         ` Ingo Molnar
2011-12-06 13:00           ` Borislav Petkov
2011-12-06 14:04             ` Srivatsa S. Bhat
2011-12-06 14:15               ` Borislav Petkov
2011-12-06 14:19                 ` Srivatsa S. Bhat
2011-12-06 14:58     ` Van De Ven, Arjan
2011-12-06 14:15   ` Srivatsa S. Bhat
2011-12-09  0:41   ` Yu, Fenghua
2011-12-09  7:28     ` Ingo Molnar
2011-12-15 18:38   ` Yu, Fenghua
2011-12-15 18:57     ` Ingo Molnar

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