kern/130330: [mpt] [panic] Panic and reboot machine MPT driver when raid is Degraded. <LSILOGIC 1030 IM 1000>

[Scott Long]

The following reply was made to PR kern/130330; it has been noted by GNATS.

From: Scott Long <scottl at samsco.org>
To: Riccardo Torrini <riccardo.torrini at esaote.com>
Cc: bug-followup at FreeBSD.org, siedar at nplay.pl, jhb at FreeBSD.org,
        scottl at FreeBSD.org
Subject: Re: kern/130330: [mpt] [panic] Panic and reboot machine MPT driver
 when raid is Degraded. &lt;LSILOGIC 1030 IM 1000&gt;
Date: Thu, 07 May 2009 10:03:39 -0600

 Riccardo Torrini wrote:
 > I restricted the time window of the problem doing (a lot of)
 > build&install world from 2008.07 up to now (read last week).
 > 
 > With 2008.07.28.17.00.00 (7.0-STABLE) works fine but
 > with 2008.07.28.18.00.00 start crashing removing the
 > the second disk of a mirror (when the mirror is ok)
 > or adding the second disk of a degraded ones.
 > 
 > Also note that the same crash happens with all 7.1
 > stable or release and even all 7.2-PRE I tested.
 > 
 > (wrapping long lines)
 > # cd /home/ncvs/src/sys/
 > # grep -R "date.*2008\.07\.28\.17" ./ | grep -v /Attic
 > 
 > ./dev/wi/if_wi.c,v:
 > 	date	2008.07.28.17.00.37;    author imp;     state Exp;
 > ./dev/wi/if_wivar.h,v:
 > 	date	2008.07.28.17.00.37;    author imp;     state Exp;
 > ./dev/mpt/mpt_raid.c,v:
 > 	date	2008.07.28.17.10.09;    author jhb;     state Exp;
 > ./dev/mpt/mpt_raid.c,v:
 > 	date	2008.07.28.17.05.09;    author jhb;     state Exp;
 > ./kern/sched_4bsd.c,v:
 > 	date	2008.07.28.17.25.24;    author jhb;     state Exp;
 > ./modules/et/Makefile,v:
 > 	date	2008.07.28.17.56.37;    author antoine; state Exp;
 > 
 > In that time window there are only 4 file changed in
 > src/sys/dev, and I bet to mpt_raid.c  :-)
 > 
 > This is the commit log extracted from cvsweb
 > -----8<-----
 > Revision 1.15.2.1:
 > Mon Jul 28 17:05:09 2008 UTC (9 months, 1 week ago) by jhb
 > Branches: RELENG_7
 > CVS tags: RELENG_7_1_BP
 > Branch point for: RELENG_7_1
 > Diff to: previous 1.15: preferred, colored
 > Changes since revision 1.15: +4 -4 lines
 > 
 > SVN rev 180920 on 2008-07-28 17:05:09Z by jhb
 > 
 > MFC: Allocate a single CCB at the start of the main loop of the RAID
 > monitoring kthread of the mpt(4) driver.
 > -----8<-----
 > 
 > Here are the diff:
 > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/mpt/mpt_raid.c.diff?r1=1.15;r2=1.15.2.1
 > 
 > 
 > What can I do now?
 > 
 > 
 
 THanks for the report.  I'll look at it.
 
 Scott