From mboxrd@z Thu Jan 1 00:00:00 1970 From: Huang Ying Subject: RE: [RFC][PATCH]ACPI,APEI,ERST, back end driver for NVRAM Date: Mon, 19 Dec 2011 09:24:29 +0800 Message-ID: <1324257869.4639.1.camel@yhuang-dev> References: <5C4C569E8A4B9B42A84A977CF070A35B2C57AC8046@USINDEVS01.corp.hds.com> <1321581563.13860.111.camel@yhuang-dev> <5C4C569E8A4B9B42A84A977CF070A35B2C57B4FA66@USINDEVS01.corp.hds.com> <1321836227.13860.121.camel@yhuang-dev> <5C4C569E8A4B9B42A84A977CF070A35B2C57F7ADB5@USINDEVS01.corp.hds.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: Received: from mga09.intel.com ([134.134.136.24]:3594 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752053Ab1LSBYc (ORCPT ); Sun, 18 Dec 2011 20:24:32 -0500 In-Reply-To: <5C4C569E8A4B9B42A84A977CF070A35B2C57F7ADB5@USINDEVS01.corp.hds.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Seiji Aguchi Cc: "linux-acpi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "lenb@kernel.org" , "Luck, Tony" , "Chen, Gong" , Matthew Garrett , "dle-develop@lists.sourceforge.net" , Satoru Moriya On Fri, 2011-12-16 at 00:03 +0800, Seiji Aguchi wrote: > Hi, > > > > >No. I have different understanding. > > > >Because error log address range resides in NVRAM, the contents will be > >reserved even after reboot. So we do not need read/clear operations at > >all, and should place all records in error log address range. > > I have a quick question about your comment above. > Do you know whether this optimization of read/clear operations works > on machines which APEI is enabled by WHEA _OSC call? I have no machine with !!(erst_erange.attr & ERST_RANGE_NVRAM) == 1 Do you have? Best Regards, Huang Ying