From owner-freebsd-stable@FreeBSD.ORG Thu Sep 13 15:06:17 2012 Return-Path: Delivered-To: stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 001C2106566B; Thu, 13 Sep 2012 15:06:16 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-lpp01m010-f54.google.com (mail-lpp01m010-f54.google.com [209.85.215.54]) by mx1.freebsd.org (Postfix) with ESMTP id 3EDE48FC19; Thu, 13 Sep 2012 15:06:15 +0000 (UTC) Received: by lage12 with SMTP id e12so2420172lag.13 for ; Thu, 13 Sep 2012 08:06:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=WGFyq6Ua2/RlTNhMfiAazubWxy52wpQfBMBC06QE6RI=; b=koYBaSA4Z59W7Oek8/Bmg3/3x9ybfCWKG0mr4td6V9dB3WeQkRCPpwMLjnZhnceou0 h3YQMJT2w4vwMYiwMPR3vQc0QEHNiG7K08g31L5y6QcngCn03NIXC7+wV7z0HyTiVK7I 5yHJR5MBGJT/m+PWMjFAPIsdaLQeFbMYNSLI9Bah006IdHUMV+emEmK39QnxAVzrHMwD P59Vzxh/dCincA9v3IBBmoZRuS0wqvbhBWJiyp5od0zSN/wKeccPZ1LqqUbUOqE49gGe R8gmXOr4fDbBrGijKxcRX94f/Z6wrhLH+whhee+hd1ygg+COGwQo4caHElTSHDhG5UQs mP3Q== Received: by 10.112.31.233 with SMTP id d9mr1029206lbi.116.1347548774006; Thu, 13 Sep 2012 08:06:14 -0700 (PDT) Received: from pc.mavhome.dp.ua (mavhome.mavhome.dp.ua. [213.227.240.37]) by mx.google.com with ESMTPS id hz16sm23575100lab.6.2012.09.13.08.06.12 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 13 Sep 2012 08:06:13 -0700 (PDT) Sender: Alexander Motin Message-ID: <5051F6A1.50900@FreeBSD.org> Date: Thu, 13 Sep 2012 18:07:13 +0300 From: Alexander Motin User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:13.0) Gecko/20120621 Thunderbird/13.0.1 MIME-Version: 1.0 To: Eugene Grosbein References: <50516F96.1020905@rdtc.ru> <5051ACBD.1090207@FreeBSD.org> <5051AEE3.7010907@rdtc.ru> In-Reply-To: <5051AEE3.7010907@rdtc.ru> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: stable@FreeBSD.org, re@FreeBSD.org Subject: Re: GEOM_RAID in GENERIC is harmful 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: Thu, 13 Sep 2012 15:06:17 -0000 On 13.09.2012 13:01, Eugene Grosbein wrote: > 13.09.2012 16:51, Alexander Motin wrote: > >>> That's makes users very angry when production server fails to boot >>> with GENERIC kernel after correctly performed upgrade. >>> >>> GEOM_RAID compiled in GENERIC should be deactivated and require activation >>> with some loader knob. Also, we need distinct RELEASE NOTES warning about the issue. >> >> Problem of on-disk metadata garbage is not limited to GEOM_RAID. For >> example, I had case where remainders of old UFS file system were found >> by GEOM_LABEL and ZFS incorrectly attached to it instead of proper GPT >> partition, making other partitions inaccessible. Does it mean we should >> remove GEOM_LABEL also? I don't think so. All what GEOM_RAID is guilty >> in is that it was not in place for 9.0 release. If we remove it now, it >> will just postpone the problem for later time or will never be able to >> add it again because of the same reasons. > > We must be ready for lots of angry users of 9.1-RELEASE then > and have BIG RED WARNING in RELEASE NOTES. Warning is good, but I don't think it will be "lots". It is enabled in 9-STABLE for some time now and I haven't seen many complains. If re@ permit to MFC r240465 in few days, solution for those who may need it will be simple: kern.geom.raid.enable=0. -- Alexander Motin