From: Borislav Petkov <bp@amd64.org>
To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>, 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 14:03:51 +0100 [thread overview]
Message-ID: <20111206130351.GC28735@gere.osrc.amd.com> (raw)
In-Reply-To: <4EDDFB8E.10801@linux.vnet.ibm.com>
On Tue, Dec 06, 2011 at 04:55:02PM +0530, Srivatsa S. Bhat wrote:
> By the way, this problem is not tied to CPU0 alone, it exists for any
> CPU! (as long as we are talking about plugging in/out CPUs physically).
Just a reminder: before you guys go and wander off into the woods of
hypothetical with this, please make sure this use case is relevant
enough for the trouble. The only real reason given so far AFAICT was RAS
and to be able to offline BSP in order to prolong system life before
maintenance.
When you take it down for maintenance eventually, you don't need to
suspend but simply poweroff.
Or...
--
Regards/Gruss,
Boris.
Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
GM: Alberto Bozzo
Reg: Dornach, Landkreis Muenchen
HRB Nr. 43632 WEEE Registernr: 129 19551
next prev parent reply other threads:[~2011-12-06 13:03 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
2011-12-06 10:47 ` Srivatsa S. Bhat
2011-12-06 11:25 ` Srivatsa S. Bhat
2011-12-06 13:03 ` Borislav Petkov [this message]
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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