From owner-svn-src-releng@FreeBSD.ORG Sat Oct 25 01:17:30 2014 Return-Path: Delivered-To: svn-src-releng@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id CFEDB2AA; Sat, 25 Oct 2014 01:17:30 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id A1FB896E; Sat, 25 Oct 2014 01:17:30 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id s9P1HUaV066780; Sat, 25 Oct 2014 01:17:30 GMT (envelope-from gjb@FreeBSD.org) Received: (from gjb@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id s9P1HUAl066779; Sat, 25 Oct 2014 01:17:30 GMT (envelope-from gjb@FreeBSD.org) Message-Id: <201410250117.s9P1HUAl066779@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: gjb set sender to gjb@FreeBSD.org using -f From: Glen Barber Date: Sat, 25 Oct 2014 01:17:30 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r273620 - releng/10.1/release/doc/en_US.ISO8859-1/errata X-SVN-Group: releng MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-releng@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: SVN commit messages for the release engineering / security commits to the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 25 Oct 2014 01:17:30 -0000 Author: gjb Date: Sat Oct 25 01:17:29 2014 New Revision: 273620 URL: https://svnweb.freebsd.org/changeset/base/273620 Log: Note to avoid using GENERIC kernel on i386 when using multi-disk ZFS pools, referencing an old UPDATING entry that predates 10.0-RELEASE. Approved by: re (implicit) Sponsored by: The FreeBSD Foundation Modified: releng/10.1/release/doc/en_US.ISO8859-1/errata/article.xml Modified: releng/10.1/release/doc/en_US.ISO8859-1/errata/article.xml ============================================================================== --- releng/10.1/release/doc/en_US.ISO8859-1/errata/article.xml Sat Oct 25 00:37:35 2014 (r273619) +++ releng/10.1/release/doc/en_US.ISO8859-1/errata/article.xml Sat Oct 25 01:17:29 2014 (r273620) @@ -132,6 +132,49 @@ boot instability may be present on virtual machines running on other hypervisors, such as Xen or KVM. + + + &os;/&arch.i386; &release.current; configured with + a multi-disk ZFS dataset (mirror, raidz1, raidz2, raidz3) + may crash during boot when the ZFS pool mount is attempted + while booting an unmodified GENERIC + kernel. + + As described in /usr/src/UPDATING + entry 20121223, rebuilding the kernel + with options KSTACK_PAGES=4 has been + observed to resolve the boot-time crash. This, however, is + not an ideal solution for inclusion in the + GENERIC kernel configuration, as + increasing KSTACK_PAGES implicitly + decreases available usermode threads in an environment that + is already resource-starved. + + Taking into account the heavy resource requirements of + ZFS, in addition to the &arch.i386;-specific tuning + requirements for general workloads, using ZFS with the + &os;/&arch.i386; GENERIC kernel + is strongly discouraged. + + + It is extremely important to take note that, by + default, &man.freebsd-update.8; will install the + GENERIC kernel configuration, and + as such, &man.freebsd-update.8; consumers are strongly + encouraged to avoid &os;-provided kernel binary upgrades + with such configurations. + + + + Although there is slight change in how the crash + manifests on &os;/&arch.i386; between &release.prev; and + &release.current;, and given the date of the + /usr/src/UPDATING entry, there is no + evidence suggesting this is a regression between + &os; &release.prev; and &os; &release.current; + directly. + +