Panic With MPT driver on Opteron System

Scott Long scottl at
Wed Mar 23 11:50:50 PST 2005

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:
>  This seems similiar to reports on both FreeBSD and
> NetBSD like:
>  And 
>  And:
>  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.


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