Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760623Ab2EPUHV (ORCPT ); Wed, 16 May 2012 16:07:21 -0400 Received: from mga02.intel.com ([134.134.136.20]:52253 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760596Ab2EPUHT (ORCPT ); Wed, 16 May 2012 16:07:19 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,351,1309762800"; d="scan'208";a="144848838" Message-ID: <4FB408F2.8060002@linux.intel.com> Date: Wed, 16 May 2012 13:07:14 -0700 From: Arjan van de Ven User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Linus Torvalds CC: Steven Rostedt , LKML , Ingo Molnar , Frederic Weisbecker , David Sharp , Vaibhav Nagarnaik , Peter Zijlstra , Andrew Morton Subject: Re: [RFC][PATCH] tracing: Remove useless 4 bytes of padding from every event References: <1337175871.6724.46.camel@gandalf.stny.rr.com> <1337198404.6724.81.camel@gandalf.stny.rr.com> In-Reply-To: X-Enigmail-Version: 1.4.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1436 Lines: 31 On 5/16/2012 1:04 PM, Linus Torvalds wrote: > On Wed, May 16, 2012 at 1:00 PM, Steven Rostedt wrote: >> >> Seriously though. What's your take on changing the kernel that will >> break an older distro. Obviously, this change is too early to apply. But >> because an old distro has one app that will break if we make a change in >> the kernel, is that enough to keep that change out? > > I suspect that powertop is enough of a developer thing that if that's > the only thing that breaks, we don't have to worry too much. > > I don't want to break *everybody*, so new distro's should be > up-to-date. But breaking something like a F14-15 timeframe distro or > something staid like a SLES (or "Debian Stale" or whatever they call > that thing that only takes crazy-old binaries)? It's fine. We don't > want to *rush* into it, but no, if those distros are basically not > updating, we can't care about them forever for something like > powertop. agreed. I would say something like "6 months" (e.g. 3.6); anybody who's likely to update anything will have done the powertop upgrade from his distro by then, and anybody who isn't isn't going to update the kernel either. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/