From owner-svn-src-all@FreeBSD.ORG Mon Apr 25 16:54:34 2011 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 694A01065675; Mon, 25 Apr 2011 16:54:34 +0000 (UTC) (envelope-from imp@bsdimp.com) Received: from harmony.bsdimp.com (bsdimp.com [199.45.160.85]) by mx1.freebsd.org (Postfix) with ESMTP id 19E538FC0A; Mon, 25 Apr 2011 16:54:34 +0000 (UTC) Received: from [10.30.101.54] ([209.117.142.2]) (authenticated bits=0) by harmony.bsdimp.com (8.14.4/8.14.3) with ESMTP id p3PGs7Nu022039 (version=TLSv1/SSLv3 cipher=DHE-DSS-AES128-SHA bits=128 verify=NO); Mon, 25 Apr 2011 10:54:09 -0600 (MDT) (envelope-from imp@bsdimp.com) Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii From: Warner Losh In-Reply-To: <4DB5A166.9010302@FreeBSD.org> Date: Mon, 25 Apr 2011 10:54:02 -0600 Content-Transfer-Encoding: quoted-printable Message-Id: <67F62848-FAA3-4C46-A95A-DA7C82281898@bsdimp.com> References: <201104240858.p3O8wwqT024628@svn.freebsd.org> <4DB441B0.8020906@FreeBSD.org> <20110425134531.GA4391@garage.freebsd.pl> <50385B7B-7EC8-4BC3-8F88-83F9EB4096FB@bsdimp.com> <4DB5A166.9010302@FreeBSD.org> To: Alexander Motin X-Mailer: Apple Mail (2.1084) X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (harmony.bsdimp.com [10.0.0.6]); Mon, 25 Apr 2011 10:54:09 -0600 (MDT) Cc: src-committers@freebsd.org, Pawel Jakub Dawidek , svn-src-all@freebsd.org, "Bjoern A. Zeeb" , Robert Watson , svn-src-head@freebsd.org Subject: Re: svn commit: r220982 - in head: . sys/amd64/conf sys/arm/conf sys/conf sys/i386/conf sys/ia64/conf sys/mips/conf sys/mips/malta sys/pc98/conf sys/powerpc/conf sys/sparc64/conf sys/sun4v/conf X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Apr 2011 16:54:34 -0000 On Apr 25, 2011, at 10:29 AM, Alexander Motin wrote: > Warner Losh wrote: >> On Apr 25, 2011, at 7:45 AM, Pawel Jakub Dawidek wrote: >>> On Sun, Apr 24, 2011 at 06:59:40PM +0000, Bjoern A. Zeeb wrote: >>>> I had been pondering devfs "link"s myself, the problem is that from = the rc >>>> framework they come too late. If you can add a simple .ko that = does it >>>> programmatically on 9 that would be great. The problem is that = after booting >>>> the new kernel you don't know whether people had ATA_STATIC on or = not, so >>>> we'd have to go with the defaults, that were in 8.x (and an extra = tunable to >>>> flip the logic maybe)? >>> We do know that people have ATA_STATIC_ID, because if they don't, = this >>> means they have their custom kernel config which doesn't contain = ATA_CAM >>> and when they will use it next time they recompile their kernel they >>> will still have /dev/adX entries. >>>=20 >>> Also, as Alexander already noted, because of all the problems with = ATA >>> naming over the years and for other reasons too, people often = hardcode >>> provider name in various GEOM classes metadata, so symlink won't = help. >>=20 >> Do we have a short list of the places to look?=20 >=20 > Quick man pages grepping shows that at least gmirror, gstripe, graid3, > gjournal, gvirstor, gconcat, gshsec support provider names hardcoding. > For gmirror and graid3 present status can be obtained by: `gXXX list | > egrep "Flags: .*HARDCODED"`. For gvirstor, gshsec, gstripe and = gconcat: > `gXXX dump adX | egrep "Hardcoded provider: ad"`. For gjournal: > `gjournal dump adX | egrep "hcprovider: ad"`. That wouldn't be too horrible... >> A lot of this could be done with a script that gets run at = installworld and boot time to hunt down the old cases and report them to = the user before they upgrade their kernel (but this would mean backing = out the GENERIC change for a while to give people a chance to upgrade to = label-based provisioning... >=20 > If I understand idea right, independently of how much we delay it, = there > will be some people who not updated during that window to get in code > detecting it during boot. Hardly many people of target auditory = updating > their systems each month. Same time some checks indeed could be done = in > installkernel. We'd have to delay it at least a month, if not more. However, the time = to have done these checks were 8.1ish rather than 9.0 nearing = code-freezeish. I'd thought there was going to be better compatibility = last year at this time, or I'd have pushed this idea harder in the = community... And yes, I'd envisioned installkernel also doing these checks, just to = be complete and prevent foot-shooting. At this point, it's all we have. = For the 9.0 install, we'll likely need to do a subset of this as people = import their gmirrors created with 8.x... Warner >=20 > --=20 > Alexander Motin >=20 >=20