From owner-freebsd-bugs@FreeBSD.ORG Mon Mar 5 20:30:10 2012 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 446141065680 for ; Mon, 5 Mar 2012 20:30:10 +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 062578FC13 for ; Mon, 5 Mar 2012 20:30:10 +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 q25KU9tP064369 for ; Mon, 5 Mar 2012 20:30:09 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.5/8.14.5/Submit) id q25KU9AH064368; Mon, 5 Mar 2012 20:30:09 GMT (envelope-from gnats) Resent-Date: Mon, 5 Mar 2012 20:30:09 GMT Resent-Message-Id: <201203052030.q25KU9AH064368@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, Garrett Wollman Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 983A1106566B for ; Mon, 5 Mar 2012 20:24:56 +0000 (UTC) (envelope-from wollman@zfsnfs.csail.mit.edu) Received: from zfsnfs.csail.mit.edu (zfsnfs.csail.mit.edu [128.30.113.117]) by mx1.freebsd.org (Postfix) with ESMTP id 5FC528FC14 for ; Mon, 5 Mar 2012 20:24:55 +0000 (UTC) Received: from zfsnfs.csail.mit.edu (localhost [127.0.0.1]) by zfsnfs.csail.mit.edu (8.14.5/8.14.5) with ESMTP id q25JrsgS005685 for ; Mon, 5 Mar 2012 14:53:54 -0500 (EST) (envelope-from wollman@zfsnfs.csail.mit.edu) Received: (from wollman@localhost) by zfsnfs.csail.mit.edu (8.14.5/8.14.5/Submit) id q25Jrrq6005684; Mon, 5 Mar 2012 14:53:53 -0500 (EST) (envelope-from wollman) Message-Id: <201203051953.q25Jrrq6005684@zfsnfs.csail.mit.edu> Date: Mon, 5 Mar 2012 14:53:53 -0500 (EST) From: Garrett Wollman To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Cc: Subject: kern/165745: geom_multipath page fault on removed drive X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Garrett Wollman List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Mar 2012 20:30:10 -0000 >Number: 165745 >Category: kern >Synopsis: geom_multipath page fault on removed drive >Confidential: no >Severity: critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Mar 05 20:30:09 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Garrett Wollman >Release: FreeBSD 9.0-RELEASE amd64 >Organization: MIT Computer Science & Artificial Intelligence Lab >Environment: System: FreeBSD zfsnfs.csail.mit.edu 9.0-RELEASE FreeBSD 9.0-RELEASE #3 r232145M: Sun Feb 26 20:00:10 EST 2012 wollman@zfsnfs.csail.mit.edu:/usr/obj/usr/src/sys/ZFSNFS amd64 This machine has a 16-port LSI SAS controller (mps driver, backported from 9-stable) with 96 external drives. All of these drives are labeled for multipath, but only one path is active. >Description: In testing, when I pulled a disk from the shelf, the kernel panicked with a page fault in geom_multipath. I did not think to get a screenshot. >How-To-Repeat: >Fix: Unknown. I'm willing to backport mav@'s rewritten multipath code from head if there's some reason to believe it will help. >Release-Note: >Audit-Trail: >Unformatted: