From owner-svn-src-head@FreeBSD.ORG Thu Sep 23 14:25:57 2010 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 00B0E106566C; Thu, 23 Sep 2010 14:25:57 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id C6A338FC1C; Thu, 23 Sep 2010 14:25:56 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id 7337346C0A; Thu, 23 Sep 2010 10:25:56 -0400 (EDT) Received: from jhbbsd.localnet (smtp.hudson-trading.com [209.249.190.9]) by bigwig.baldwin.cx (Postfix) with ESMTPSA id 43E8F8A04F; Thu, 23 Sep 2010 10:25:55 -0400 (EDT) From: John Baldwin To: Bruce Cran Date: Thu, 23 Sep 2010 09:53:55 -0400 User-Agent: KMail/1.13.5 (FreeBSD/7.3-CBSD-20100819; KDE/4.4.5; amd64; ; ) References: <201009211507.o8LF7iVv097676@svn.freebsd.org> <4C9A6EE6.5050301@freebsd.org> <20100922222441.00002f27@unknown> In-Reply-To: <20100922222441.00002f27@unknown> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201009230953.56201.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (bigwig.baldwin.cx); Thu, 23 Sep 2010 10:25:55 -0400 (EDT) X-Virus-Scanned: clamav-milter 0.95.1 at bigwig.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=4.2 tests=AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on bigwig.baldwin.cx Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, Gavin Atkinson , src-committers@freebsd.org, Andriy Gapon Subject: Re: svn commit: r212964 - head/sys/kern X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Sep 2010 14:25:57 -0000 On Wednesday, September 22, 2010 5:24:41 pm Bruce Cran wrote: > On Thu, 23 Sep 2010 00:02:30 +0300 > Andriy Gapon wrote: > > > But what was the reason that dumpdev="AUTO" was reverted? > > I remember that POLA was quoted at the time. > > I am not sure what the astonishment actually was - perhaps 'AUTO' was > > not smart enough and destroyed somebody's data? > > > > The problem with "AUTO" is that it takes time to do the dump unless > using textdumps; it also has the potential of failing and leaving the > system unusable until someone resets it. I believe the argument was > that for production servers you want the system to be up and running > again as soon as possible after a crash. minidumps have made the time issue less of a concern on large-memory systems (full dumps do indeed take a long time on modern systems). I think textdumps are just as likely to fail as regular dumps though since they both use the same code for writing out the dump, they just write different bits to the dump area. -- John Baldwin