From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mauro Carvalho Chehab Subject: Re: [PATCH 3/3] ghes_edac: add platform check to enable ghes_edac Date: Wed, 19 Jul 2017 13:02:45 -0300 Message-ID: <20170719130245.7fc97352@vento.lan> References: <20170717215912.26070-1-toshi.kani@hpe.com> <20170717215912.26070-4-toshi.kani@hpe.com> <20170718060007.GB8736@nazgul.tnic> <1500407379.2042.21.camel@hpe.com> <20170718181545.32bd9181@vento.lan> <20170719055838.GF26030@nazgul.tnic> <3908561D78D1C84285E8C5FCA982C28F6130D126@ORSMSX114.amr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from ec2-52-27-115-49.us-west-2.compute.amazonaws.com ([52.27.115.49]:34080 "EHLO osg.samsung.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932215AbdGSQCz (ORCPT ); Wed, 19 Jul 2017 12:02:55 -0400 In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F6130D126@ORSMSX114.amr.corp.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Luck, Tony" , Aristeu Rozanski Cc: "rjw@rjwysocki.net" , "srinivas.pandruvada@linux.intel.com" , "lenb@kernel.org" , "linux-acpi@vger.kernel.org" , "linux-edac@vger.kernel.org" Tony/Aris, I got yesterday an HP ML350 G9, equipped with Sandy Bridge EP CPUs (E5-2640v4). I'm running Kernel 4.11 there. AFAIKT, Sandy Bridge EP has 4 channels per memory controller, right? That would match the number of memory slots on this machine (24 slots). Yet, EDAC is only identifying 3 channels per CPU: $ ras-mc-ctl --layout +-----------------------------------------------------------------------+ | mc0 | mc1 | | channel0 | channel1 | channel2 | channel0 | channel1 | channel2 | -------+-----------------------------------------------------------------------+ slot2: | 0 MB | 0 MB | 0 MB | 0 MB | 0 MB | 0 MB | slot1: | 0 MB | 0 MB | 0 MB | 0 MB | 0 MB | 0 MB | slot0: | 16384 MB | 0 MB | 16384 MB | 16384 MB | 0 MB | 16384 MB | -------+---------------------------------------------------------------------------+ So, it seems that either the BIOS is hidden the other channel or there's something wrong with SandyBridge EP support at sb_edac driver. Thanks, Mauro