From owner-freebsd-scsi@FreeBSD.ORG  Wed Oct 15 13:38:49 2003
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Date: Wed, 15 Oct 2003 13:38:49 -0700 (PDT)
From: Nate Lawson <nate@root.org>
To: David Sze <dsze@alumni.uwaterloo.ca>
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cc: freebsd-scsi@freebsd.org
Subject: Re: Dell PowerEdge 1750 and mpt
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On Wed, 15 Oct 2003, David Sze wrote:
> On Wed, Oct 15, 2003 at 10:12:49AM -0700, Nate Lawson wrote:
> > On Wed, 15 Oct 2003, David Sze wrote:
> > > The application talks to pass(4) to periodically retrieve the serial
> > > numbers of all devices on the bus (the code is basically copied from
> > > "camcontrol inquiry -S", plus some code to enumerate the bus).  So that is
> > > consistent with how often we are seeing the crashes.  I'll go over the code
> > > to make sure there are no blatant errors on my part.  The only puzzling
> > > thing is that the same code runs flawlessly on a variety of similar
> > > hardware, some machines also with mpt(4), but mostly ahc(4) and ahd(4)
> > > controllers.
> >
> > Try running camcontrol inquiry -S on the same device in a loop and see if
> > it gets the same panic.
>
> Running "camcontrol inquiry pass3 -S" in a loop for 1000 times was just
> fine, there was no panic.

I'm out of time for this thread.  Find the diff between your code and
camcontrol inquiry -S and you'll find the bug.

-Nate