From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753209Ab2DQXA6 (ORCPT ); Tue, 17 Apr 2012 19:00:58 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:50985 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751469Ab2DQXA5 (ORCPT ); Tue, 17 Apr 2012 19:00:57 -0400 Date: Tue, 17 Apr 2012 16:00:55 -0700 From: Andrew Morton To: KOSAKI Motohiro Cc: Doug Ledford , linux-kernel@vger.kernel.org Subject: Re: [Patch 2/8] ipc/mqueue: switch back to using non-max values on create Message-Id: <20120417160055.f8e35101.akpm@linux-foundation.org> In-Reply-To: <4F8DEF79.409@gmail.com> References: <20120417151729.e255188c.akpm@linux-foundation.org> <4F8DEF79.409@gmail.com> X-Mailer: Sylpheed 3.0.2 (GTK+ 2.20.1; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 17 Apr 2012 18:32:25 -0400 KOSAKI Motohiro wrote: > > Here the "future patch" is "mqueue: separate mqueue default value from > > maximum value v2" in this series, yes? > > > > So people who have applications which are broken by this patch will > > need to manually set /proc/sys/fs/mqueue/msg_default and/or > > /proc/sys/fs/mqueue/msgsize_default to get those apps working again? > > > > Yes, it works. > OK, I updated the changelog for this patch to reflect that. I worry a bit that some people who we don't know about will hit this problem and will have to spend a lot of time working out why it broke. Is there some way in which we can make it easier for them? A little printk_once() in a suitable place?