lkml.org 
[lkml]   [2011]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 0/3] Freezer, CPU hotplug, x86 Microcode: Fix task freezing failures
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


\
 
 \ /
  Last update: 2011-10-10 22:37    [W:0.055 / U:0.412 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site