Date: Mon, 5 Mar 2012 14:53:53 -0500 (EST) From: Garrett Wollman <wollman@csail.mit.edu> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/165745: geom_multipath page fault on removed drive Message-ID: <201203051953.q25Jrrq6005684@zfsnfs.csail.mit.edu> Resent-Message-ID: <201203052030.q25KU9AH064368@freefall.freebsd.org>
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>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:
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