From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753541AbdIDKrV (ORCPT ); Mon, 4 Sep 2017 06:47:21 -0400 Received: from mail.skyhub.de ([5.9.137.197]:49988 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753411AbdIDKrT (ORCPT ); Mon, 4 Sep 2017 06:47:19 -0400 Date: Mon, 4 Sep 2017 12:47:17 +0200 From: Borislav Petkov To: mark gross , Steven Rostedt Cc: Tony Luck , linux-edac , Yazen Ghannam , X86 ML , LKML , Mauro Carvalho Chehab Subject: Re: [PATCH 0/7] EDAC, mce_amd: Issue decoded MCE through the tracepoint Message-ID: <20170904104717.rs4tuazdhtjvueac@pd.tnic> References: <20170825102411.8682-1-bp@alien8.de> <20170828134549.wh6toneoca47ff2w@pd.tnic> <20170830114843.deetnlz2wjbgbaj4@pd.tnic> <20170830214719.GC103314@mtgdev> <20170830193058.00740c87@gandalf.local.home> <20170903233704.GC90926@mtgdev> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20170903233704.GC90926@mtgdev> User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Sep 03, 2017 at 04:37:04PM -0700, mark gross wrote: > > It's the old, if a tree falls in the forest issue. If you break the ABI > > but nobody is around to notice, did it really break? > > perhaps, but what I was trying to point out was: "multi line debugFS printf's > like this are very easy to change to append other information and you might > want to worry about the ABI implications that could happen in the future." Right, as I said to Mark earlier: "Yeah, the moment something starts using it, it is ABI. The good thing about it is, though, that it can get stuff appended to it, just like tracepoints get fields added. And tools should be able to handle parsing appended lines fine. Removing lines OTOH is always problematic. But we'll make that append-only." It is basically the same principle as with tracepoints where we can add members easily. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.