From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753617AbbIAT0j (ORCPT ); Tue, 1 Sep 2015 15:26:39 -0400 Received: from www.linutronix.de ([62.245.132.108]:57105 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752397AbbIAT0j (ORCPT ); Tue, 1 Sep 2015 15:26:39 -0400 Date: Tue, 1 Sep 2015 21:26:06 +0200 (CEST) From: Thomas Gleixner To: Linda Knippers cc: linux-kernel@vger.kernel.org, x86@kernel.org, mingo@redhat.com, hpa@zytor.com Subject: Re: [PATCH] arch/x86/mm/srat: Print non-volatile flag in SRAT In-Reply-To: <55E5FB21.5050406@hp.com> Message-ID: References: <20150901162155.GB3418@ljkz400> <55E5FB21.5050406@hp.com> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 1 Sep 2015, Linda Knippers wrote: > 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. Indeed. And that explanation wants to be in the changelog. Care to resend? Thanks, tglx