From owner-freebsd-bugs@FreeBSD.ORG Thu Sep 20 07:00:26 2012 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0986D1065674 for ; Thu, 20 Sep 2012 07:00:25 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id EBA7E8FC24 for ; Thu, 20 Sep 2012 07:00:24 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id q8K70OEC059488 for ; Thu, 20 Sep 2012 07:00:24 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.5/8.14.5/Submit) id q8K70OxT059487; Thu, 20 Sep 2012 07:00:24 GMT (envelope-from gnats) Resent-Date: Thu, 20 Sep 2012 07:00:24 GMT Resent-Message-Id: <201209200700.q8K70OxT059487@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Karli Sjöberg Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 14A69106566B for ; Thu, 20 Sep 2012 06:50:28 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from red.freebsd.org (red.freebsd.org [IPv6:2001:4f8:fff6::22]) by mx1.freebsd.org (Postfix) with ESMTP id F40488FC0A for ; Thu, 20 Sep 2012 06:50:27 +0000 (UTC) Received: from red.freebsd.org (localhost [127.0.0.1]) by red.freebsd.org (8.14.5/8.14.5) with ESMTP id q8K6oR2B003358 for ; Thu, 20 Sep 2012 06:50:27 GMT (envelope-from nobody@red.freebsd.org) Received: (from nobody@localhost) by red.freebsd.org (8.14.5/8.14.5/Submit) id q8K6oRwV003348; Thu, 20 Sep 2012 06:50:27 GMT (envelope-from nobody) Message-Id: <201209200650.q8K6oRwV003348@red.freebsd.org> Date: Thu, 20 Sep 2012 06:50:27 GMT From: Karli Sjöberg To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: misc/171805: Delay during gptzfsboot X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Sep 2012 07:00:26 -0000 >Number: 171805 >Category: misc >Synopsis: Delay during gptzfsboot >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Sep 20 07:00:24 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Karli Sjöberg >Release: 9.0 >Organization: SLU >Environment: FreeBSD zfs1-1 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Wed Apr 25 13:27:34 CEST 2012 admin@zfs1-1:/usr/obj/usr/src/sys/GENERIC amd64 >Description: The GPT ZFS-loader was recently changed from probing 4 partitions to 128 for booting, even if the disk only has two partitions... Imagine what this did to storage systems with 50 disks(or more) attached; that´s 50*128 of the delay it takes to probe at BTX. For me, this changed the time to reboot a server to up to 20mins, while the normal time after the fix is more like 2mins. Other users at FreeBSD forums have reported delays over 10+mins as well: https://forums.freebsd.org/showthread.php?t=31902 >How-To-Repeat: Install FreeBSD-9.0-RELEASE with boot on ZFS >Fix: So, to change back this behavior: Phase 1. # sed -i '' 's/128/4/' /sys/boot/zfs/zfs.c Phase 2. Rebuild kernel/world Phase 3. Profit! And booting is back to normal. This is something I always have to do with newly installed storage servers with FreeBSD-9.0-RELEASE to get back to a normal reboot time. >Release-Note: >Audit-Trail: >Unformatted: