kern/165745: geom_multipath page fault on removed drive
Garrett Wollman
wollman at csail.mit.edu
Mon Mar 5 20:30:10 UTC 2012
>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 at 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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