Date: Mon, 11 Aug 2014 13:59:39 -0700 From: John-Mark Gurney <jmg@funkthat.com> To: Garrett Wollman <wollman@bimajority.org> Cc: freebsd-scsi@freebsd.org, freebsd-stable@freebsd.org Subject: Re: 9.3-RELEASE still instapanics on multi-mps(4) servers Message-ID: <20140811205939.GY83475@funkthat.com> In-Reply-To: <21474.34330.572142.206098@hergotha.csail.mit.edu> References: <21474.34330.572142.206098@hergotha.csail.mit.edu>
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Garrett Wollman wrote this message on Wed, Aug 06, 2014 at 15:46 -0400:
> Remember about six months ago when I tested 9-stable on one of my big
> NFS servers, and had it panic in the middle of the USB probe, but
> ultimately bisected the problem to an update to the mps(4) driver? I
> had to stop investigating and get the server working (which I did, by
> installing 9.2 instead of something newer and presumably faster). I'm
> at the point now where I'd like to upgrade my file servers to 9.3, and
> I can't, because of this issue, so it's time to start tracking down
> the bug again.
>
> I have two test servers now. 9.3 works just fine on one of them, and
> panics on the other. The one it works on is slightly older, and has
> an mpt(4) controller for the boot drives, as opposed to the system
> where the panic happens, which is mps(4)-only. Both systems have two
> SAS2116 controllers for external drives; the ones on the working
> system have drives attached, and the ones on the non-working system
> are not connected to anything (and in fact disabled in the BIOS for
> now).
>
> Any experts want to suggest where to start (besides, obviously,
> attaching a serial console, which I haven't done yet)? I saw one
> change in the svn logs for 9.3 prior to the release which looked like
> it might be a relevant fix, but it clearly hasn't improved anything
> for my servers.
One thing you could do is turn on DEBUG_MEMGUARD and DEBUG_REDZONE
and see if they trigger...
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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