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

[Riccardo Torrini]

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

From: Riccardo Torrini <riccardo.torrini at esaote.com>
To: bug-followup at FreeBSD.org, siedar at nplay.pl, jhb at freebsd.org,
        scottl at freebsd.org
Cc:  
Subject: Re: kern/130330: [mpt] [panic] Panic and reboot machine MPT driver
	when raid is Degraded. &lt;LSILOGIC 1030 IM 1000&gt;
Date: Thu, 7 May 2009 17:38:08 +0200

 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?
 
 
 -- 
 Riccardo.
 Network Manager @ ESAOTE S.p.A.