From owner-freebsd-stable@FreeBSD.ORG Fri Aug 1 12:44:18 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 18F981065688 for ; Fri, 1 Aug 2008 12:44:18 +0000 (UTC) (envelope-from bright@elvis.mu.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.freebsd.org (Postfix) with ESMTP id 01D638FC12 for ; Fri, 1 Aug 2008 12:44:17 +0000 (UTC) (envelope-from bright@elvis.mu.org) Received: by elvis.mu.org (Postfix, from userid 1192) id DA8D01A4D80; Fri, 1 Aug 2008 05:44:17 -0700 (PDT) Date: Fri, 1 Aug 2008 05:44:17 -0700 From: Alfred Perlstein To: Ken Smith Message-ID: <20080801124417.GA76659@elvis.mu.org> References: <1217346345.12322.31.camel@bauer.cse.buffalo.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1217346345.12322.31.camel@bauer.cse.buffalo.edu> User-Agent: Mutt/1.4.2.3i Cc: freebsd-current , freebsd-stable Subject: Re: Upcoming ABI Breakage in RELENG_7 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Aug 2008 12:44:18 -0000 * Ken Smith [080729 08:47] wrote: > > Normally the FreeBSD Project tries very hard to avoid ABI breakage in > "Stable Branches". However occasionally the fix for a bug can not be > implemented without ABI breakage, and it is decided that the fix > warrants the impact of the ABI breakage. We have one of those > situations coming along for RELENG_7 (what will become FreeBSD 7.1). > The ABI breakage should only impact kernel modules that are not part of > the baseline system (those will be patched by the MFC) which deal with > advisory locks. As such the impact should not cause many people > problems. > > The work that will be MFCed fixes issues with filesystem advisory locks, > and moves the advisory locks list from filesystem-private data > structures into the vnode structure. > > The MFC will be done by Kostantin Belousov some time this coming Friday > (August 1st, 2008) if you have concerns and want to watch for it. Ken, Can you point at a cvs/svn log or two that details the change and why? Everyone else: For those confused about what ABI breakage means: It means that you'll need to recompile your kernel modules and potentially your system utilities that access kernel data structures to display statistics. It seems like in this particular case you won't need to recompile, but it's a good idea just to be safe to recompile kernel, world and any third party kernel modules you have. thank you, -Alfred