Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753059AbbHYCZQ (ORCPT ); Mon, 24 Aug 2015 22:25:16 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:43448 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751084AbbHYCZO (ORCPT ); Mon, 24 Aug 2015 22:25:14 -0400 User-Agent: K-9 Mail for Android In-Reply-To: References: <20150824125902.4ba11ec6@gandalf.local.home> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 From: "Eric W. Biederman" Date: Mon, 24 Aug 2015 20:24:53 -0600 To: Sean Fu , Steven Rostedt CC: Andrey Ryabinin , Ulrich Obergfell , Prarit Bhargava , Eric B Munson , "Paul E. McKenney" , Johannes Weiner , Andrew Morton , Thomas Gleixner , Don Zickus , Heinrich Schuchardt , David Rientjes , linux-kernel@vger.kernel.org Message-ID: <9CF68C3D-499C-4AFC-B890-BA5ECA284347@xmission.com> X-XM-AID: U2FsdGVkX19ofloCSPzMAcZ1EgkSybY7HQuHdvariTI= X-SA-Exim-Connect-IP: 38.108.87.20 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.7 XMSubLong Long Subject * 0.3 TooManyTo_001 Multiple "To" Header Recipients 2x (uncommon) * 0.0 T_TM2_M_HEADER_IN_MSG BODY: No description available. * 0.8 BAYES_50 BODY: Bayes spam probability is 40 to 60% * [score: 0.4993] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa06 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 T_TooManySym_02 5+ unique symbols in subject * 0.0 T_TooManySym_01 4+ unique symbols in subject * 0.0 T_TooManySym_03 6+ unique symbols in subject X-Spam-DCC: XMission; sa06 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Sean Fu ,Steven Rostedt X-Spam-Relay-Country: X-Spam-Timing: total 275 ms - load_scoreonly_sql: 0.23 (0.1%), signal_user_changed: 4.3 (1.6%), b_tie_ro: 3.0 (1.1%), parse: 2.3 (0.8%), extract_message_metadata: 3.9 (1.4%), get_uri_detail_list: 0.97 (0.4%), tests_pri_-1000: 6 (2.2%), tests_pri_-950: 1.81 (0.7%), tests_pri_-900: 1.35 (0.5%), tests_pri_-400: 20 (7.2%), check_bayes: 19 (6.8%), b_tokenize: 6 (2.1%), b_tok_get_all: 6 (2.1%), b_comp_prob: 1.83 (0.7%), b_tok_touch_all: 2.5 (0.9%), b_finish: 0.82 (0.3%), tests_pri_0: 217 (78.9%), tests_pri_500: 6 (2.0%), rewrite_mail: 0.00 (0.0%) Subject: Re: [PATCH] kernel/sysctl.c: If "count" including the terminating byte '\0' the write system call should retrun success. X-Spam-Flag: No X-SA-Exim-Version: 4.2.1 (built Wed, 24 Sep 2014 11:00:52 -0600) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 995 Lines: 21 On August 24, 2015 6:57:57 PM MDT, Sean Fu wrote: >An application from HuaWei which works fine on 2.6 encounters this >issue on 3.0 or later kernel. My sympathies. Being stuck with a 3rd party application you can barely talk about that has been broken for 5years and no one reported it. Ordinarily we would fix a regression like this. As it has been 5years the challenge now is how do we tell if there are applications that depend on the current behavior. Before we can change the behavior back we need a convincing argument that we won't cause a regression in another application by making the change. I do not see how such an argument can be made. So you have my sympathies but I do not see how we can help you. Eric -- 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/