From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: Re: [PATCH 7/8] ACPI, APEI, CPER: Cleanup CPER memory error output format Date: Tue, 15 Oct 2013 14:29:58 +0200 Message-ID: <20131015122958.GD7908@pd.tnic> References: <1381473166-29303-1-git-send-email-gong.chen@linux.intel.com> <1381473166-29303-8-git-send-email-gong.chen@linux.intel.com> <20131011160208.GL5925@pd.tnic> <20131014045500.GC12189@gchen.bj.intel.com> <20131014103616.GE4009@pd.tnic> <525D2A07.6080201@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Received: from mail.skyhub.de ([78.46.96.112]:43728 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932270Ab3JOMaL (ORCPT ); Tue, 15 Oct 2013 08:30:11 -0400 Content-Disposition: inline In-Reply-To: <525D2A07.6080201@linux.vnet.ibm.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Naveen N. Rao" Cc: Tony Luck , Chen Gong , Linux Kernel Mailing List , linux-acpi , Lance Ortiz On Tue, Oct 15, 2013 at 05:11:59PM +0530, Naveen N. Rao wrote: > If so, how will disabling dmesg output and switching to a trace event > help? The user-space program will still break unless they add support > for that trace event, right? Well, as yourself this: what happens to a userspace program which relies on this *exact* error message format and greps dmesg? > I'm not sure if we actually provide guarantees w.r.t kernel log > messages. The issue in this specific scenario is the sheer verbosity > of the log messages. No, the issue is what I said above: userspace programs expecting exactly this output. Once we exposed it to userspace, we cannot simply assume that nothing is using it. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --