From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753982AbbIATXR (ORCPT ); Tue, 1 Sep 2015 15:23:17 -0400 Received: from g2t2352.austin.hp.com ([15.217.128.51]:37342 "EHLO g2t2352.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753303AbbIATXP (ORCPT ); Tue, 1 Sep 2015 15:23:15 -0400 X-Greylist: delayed 10875 seconds by postgrey-1.27 at vger.kernel.org; Tue, 01 Sep 2015 15:23:15 EDT Subject: Re: [PATCH] arch/x86/mm/srat: Print non-volatile flag in SRAT To: Thomas Gleixner References: <20150901162155.GB3418@ljkz400> Cc: linux-kernel@vger.kernel.org, x86@kernel.org, mingo@redhat.com, hpa@zytor.com From: Linda Knippers X-Enigmail-Draft-Status: N1110 Message-ID: <55E5FB21.5050406@hp.com> Date: Tue, 1 Sep 2015 15:23:13 -0400 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/1/2015 3:17 PM, Thomas Gleixner wrote: > On Tue, 1 Sep 2015, Linda Knippers wrote: >> Nobody checks this flag but it would be interesting to know if it's being >> set on any platforms. > > What you're omitting to explain, is WHY it would be interesting. With the addition of NVDIMM support, a question came up as to whether NVDIMM ranges should be in the SRAT with this bit set. I think the consensus was no because the ranges are in the NFIT with proximity domain information there. ACPI is not clear on the meaning of this bit in the SRAT. If someone is setting it, we might want to ask them what they expect to happen with it. Right now this bit is only printed if all the ACPI debug information is turned on. Sorry, I should have explained more. -- ljk > > Thanks, > > tglx >