From: Borislav Petkov <bp@amd64.org>
To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: "tj@kernel.org" <tj@kernel.org>,
Alan Stern <stern@rowland.harvard.edu>,
"rjw@sisk.pl" <rjw@sisk.pl>, "pavel@ucw.cz" <pavel@ucw.cz>,
"len.brown@intel.com" <len.brown@intel.com>,
"mingo@elte.hu" <mingo@elte.hu>,
"a.p.zijlstra@chello.nl" <a.p.zijlstra@chello.nl>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"suresh.b.siddha@intel.com" <suresh.b.siddha@intel.com>,
"lucas.demarchi@profusion.mobi" <lucas.demarchi@profusion.mobi>,
"rusty@rustcorp.com.au" <rusty@rustcorp.com.au>,
"rdunlap@xenotime.net" <rdunlap@xenotime.net>,
"vatsa@linux.vnet.ibm.com" <vatsa@linux.vnet.ibm.com>,
"ashok.raj@intel.com" <ashok.raj@intel.com>,
"tigran@aivazian.fsnet.co.uk" <tigran@aivazian.fsnet.co.uk>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"hpa@zytor.com" <hpa@zytor.com>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>
Subject: Re: [PATCH v2 0/3] Freezer, CPU hotplug, x86 Microcode: Fix task freezing failures
Date: Mon, 10 Oct 2011 22:35:13 +0200 [thread overview]
Message-ID: <20111010203513.GB30798@aftab> (raw)
In-Reply-To: <4E9340C2.4090901@linux.vnet.ibm.com>
On Mon, Oct 10, 2011 at 03:00:18PM -0400, Srivatsa S. Bhat wrote:
> > Hmm... is it possible to tell whether the core coming online is the
> > same one as the last time? If that's possible, the problem becomes
> > pretty simple and we can simply tell people who are mixing
> > suspend/hibernate with physical hotplug that they're crazy.
> >
>
> I think that is pretty easy, atleast from a microcode revision standpoint:
> the collect_cpu_info() function (defined in arch/x86/kernel/microcode_core.c
> and arch/x86/kernel/microcode_intel.c or ..._amd.c) can be used for that
> purpose. Am I right Boris?
Correct, on AMD the PATCH_LEVEL MSR (0x8b) contains the ... doh, current
patch level of the core, i.e. the applied ucode version.
--
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:[~2011-10-10 20:35 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-10 12:31 [PATCH v2 0/3] Freezer, CPU hotplug, x86 Microcode: Fix task freezing failures Srivatsa S. Bhat
2011-10-10 12:32 ` [PATCH v2 1/3] Introduce helper functions Srivatsa S. Bhat
2011-10-10 12:33 ` [PATCH v2 2/3] Mutually exclude cpu online and suspend/hibernate Srivatsa S. Bhat
2011-10-10 12:45 ` Srivatsa S. Bhat
2011-10-10 14:26 ` Peter Zijlstra
2011-10-10 15:16 ` Srivatsa S. Bhat
2011-10-11 20:32 ` Srivatsa S. Bhat
2011-10-11 21:56 ` Rafael J. Wysocki
2011-10-12 3:57 ` Srivatsa S. Bhat
2011-10-12 19:31 ` Rafael J. Wysocki
2011-10-12 21:25 ` Srivatsa S. Bhat
2011-10-12 22:09 ` Rafael J. Wysocki
2011-10-13 15:42 ` Srivatsa S. Bhat
2011-10-13 16:06 ` Tejun Heo
2011-10-13 17:01 ` Borislav Petkov
2011-10-13 17:29 ` Srivatsa S. Bhat
2011-10-19 17:29 ` Srivatsa S. Bhat
2011-10-13 18:03 ` Alan Stern
2011-10-13 19:07 ` Rafael J. Wysocki
2011-10-13 19:08 ` Rafael J. Wysocki
2011-10-10 15:25 ` Alan Stern
2011-10-10 17:00 ` Tejun Heo
2011-10-11 9:18 ` Peter Zijlstra
2011-10-11 9:37 ` Srivatsa S. Bhat
2011-10-10 12:33 ` [PATCH v2 3/3] Update documentation Srivatsa S. Bhat
2011-10-10 15:23 ` [PATCH v2 0/3] Freezer, CPU hotplug, x86 Microcode: Fix task freezing failures Alan Stern
2011-10-10 15:32 ` Srivatsa S. Bhat
2011-10-10 16:53 ` Borislav Petkov
2011-10-10 17:14 ` Pavel Machek
2011-10-10 17:30 ` Srivatsa S. Bhat
2011-10-10 17:53 ` Borislav Petkov
2011-10-10 18:08 ` tj
2011-10-10 18:34 ` Borislav Petkov
2011-10-10 18:45 ` Srivatsa S. Bhat
2011-10-10 18:53 ` tj
2011-10-10 19:00 ` Srivatsa S. Bhat
2011-10-10 20:35 ` Borislav Petkov [this message]
[not found] ` <20111010202913.GA30798@aftab>
2011-10-10 21:13 ` tj
2011-10-11 9:17 ` Peter Zijlstra
2011-10-10 16:57 ` Tejun Heo
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