From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422754Ab3FUOIR (ORCPT ); Fri, 21 Jun 2013 10:08:17 -0400 Received: from mail.skyhub.de ([78.46.96.112]:56668 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161446Ab3FUOIP (ORCPT ); Fri, 21 Jun 2013 10:08:15 -0400 Date: Fri, 21 Jun 2013 16:08:04 +0200 From: Borislav Petkov To: "Naveen N. Rao" Cc: tony.luck@intel.com, ananth@in.ibm.com, masbock@linux.vnet.ibm.com, lcm@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, ying.huang@intel.com Subject: Re: [PATCH v2 1/2] mce: acpi/apei: Honour Firmware First for MCA banks listed in APEI HEST CMC Message-ID: <20130621140804.GF22006@pd.tnic> References: <20130620073943.GE32694@pd.tnic> <51C3531D.3000600@linux.vnet.ibm.com> <20130620192928.GD19877@pd.tnic> <51C36288.4050405@linux.vnet.ibm.com> <20130620205726.GA20863@pd.tnic> <51C37291.40303@linux.vnet.ibm.com> <20130621073419.GC22006@pd.tnic> <51C404EA.10906@linux.vnet.ibm.com> <20130621083608.GE22006@pd.tnic> <51C41D94.1030201@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <51C41D94.1030201@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 21, 2013 at 03:02:04PM +0530, Naveen N. Rao wrote: > As an example, consider a hypothetical single-core Intel processor > with Hyperthreading. On init, let's say the first cpu ends up owning > banks 1, 2, 3 and 4; and the second cpu ends up owning banks 1 and > 2. This would mean that MC banks 1 and 2 are "hyperthread"-specific, > while banks 3 and 4 are shared. Now, if we offline the first cpu, it > disables CMCI on all 4 banks. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ This is what I find strange - having to disable CMCI, especially on a shared bank, just to reenable it right back on the next core. But I guess this is a constraint dictated by the hardware... -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --