Panic With MPT driver on Opteron System

[Scott Long]

NMH wrote:
> Hello
>  I am having a odd problem I hope someone can help
> with.
> 
>  I have a TYAN 2882 board with 4 gigs of memory and a
> single Opteron 248 Processor. I am using an Infortrend
> RAID controller that won't play nice with Adaptec at
> 320 speeds so I am using an LSI 1030 based PCI-X SCSI
> card instead of the built in Adaptec. Hence the mpt
> driver. The system is FreeBSD 5.4-PRERELEASE from
> March 2nd.
> 
>  The system runs very fast but when testing under
> somewhat heavy load the system will panic and freeze
> with: 
>  Panic: mpt_get_request: corrupted request free list
> (ccb)
>  It was also reported that when trying to do a ps auxw
> it would sometimes (never happened to me) report that
> it was out of inodes. Which is insane.
> 
>  A screen capture of the frozen console can be seen
> at:
> 
> http://pic2.picturetrail.com/VOL965/3391974/6964630/90153559.jpg
> 
>  This seems similiar to reports on both FreeBSD and
> NetBSD like:
> 
> http://mail-index.netbsd.org/netbsd-bugs/2004/03/03/0004.html
>  And 
> http://mail-index.netbsd.org/netbsd-bugs/2004/02/12/0003.html
>  And:
> http://lists.freebsd.org/pipermail/freebsd-scsi/2003-April/000058.html
> 
>  Any assistance would be appreciatted. 
> 
>  Thanks!
> 
>   N.
> 

I think that you're seeing the effects of the driver having extremely
broken error recovery.  This is a known problem, and a fix will likely
be going into the tree soon.

Scott