mptutil(8) segfault on IBM xSeries 3550

Charles Owens cowens at greatbaysoftware.com
Fri Feb 19 17:57:08 UTC 2010


John Baldwin wrote:
> On Monday 15 February 2010 5:25:15 pm Charles Owens wrote:
>> Charles Owens wrote:
>>> Howdy,
>>>
>>> We're working with IBM hardware (xSeries 3550) that has an
>>> mpt-based RAID controller... after initial success with testing the
>>> mptutil utility, now operations other than "show adapter" and "show
>>> volume" are resulting in segfaults.
>>>
>>> While it was working properly we created and removed volumes several
>>> times, force-failed drives, and just generally put it through its
>>> paces... and all seemed fine.  Then, after a reboot, it suddenly started
>>> failing with segfault as described, and nothing we do has helped to get
>>> it out of this state (including trying to use the LSI in-BIOS manager to
>>> create/delete volumes -- which in and of itself works fine).
>>>
>>> We found recent thread
>>> http://docs.freebsd.org/cgi/mid.cgi?4B56CD4C.80503 and hoped that it
>>> might somehow relate... and even tried the patch that John Baldwin
>>> posted, but to no avail.
>>>
>>> Has anyone seen this behavior and/or have a suggested fix or workaround?
>>>
>>>
>>> Here's the output of "mptutil show adapter":
>>>
>>> mpt0 Adapter:
>>>        Board Name: SR-BR10i
>>>    Board Assembly: L3-25116-01H
>>>         Chip Name: C1068E
>>>     Chip Revision: UNUSED
>>>       RAID Levels: RAID0, RAID1, RAID1E
>>>     RAID0 Stripes: 64K
>>>    RAID1E Stripes: 64K
>>>  RAID0 Drives/Vol: 1-10
>>>  RAID1 Drives/Vol: 2
>>> RAID1E Drives/Vol: 3-10
>>>
>>>
>>> This work is being done using FreeBSD 8.0-RELEASE-p2 + PAE.
>>>   
>>
>> I should add that the RAID controller in question is the IBM
>> ServeRAID-BR10i SAS/SATA Controller which is based on the LSI 1068E
>> processor, as described here:
>> http://www-01.ibm.com/common/ssi/rep_ca/4/872/ENUSAG09-0104/index.html
> 
> Try this updated patch.  It should fix the problems with 'mptutil show drives' 
> displaying all daX devices in the system rather than just the ones for the 
> mptX bus.  I had incorrectly interpreted the XPT matches as being an AND 
> rather than an OR.  This changes the code to first do a lookup for the logical 
> "path" (SCSI bus) for mptX devices and then do a second lookup to fetch any 
> daX devices on that path.  I tested it on a machine with an mpt controller and 
> a USB disk.  Unfortunately I wasn't able to test any of the RAID stuff, just 
> 'show drives'.  This mpt(4) controller doesn't support RAID either, so I was 
> also able to verify the fix you had already tested for cleaning up 'show 
> adapter' output in that case.
> 
> [patch omitted]


John,

The patch appears to have resolved the problem.   We're still banging on
it, but so far it looks very good!

Thanks very much!

Charles



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