Date: Wed, 6 Aug 2014 15:46:34 -0400 From: Garrett Wollman <wollman@bimajority.org> To: freebsd-stable@freebsd.org Cc: freebsd-scsi@freebsd.org Subject: 9.3-RELEASE still instapanics on multi-mps(4) servers Message-ID: <21474.34330.572142.206098@hergotha.csail.mit.edu>
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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. -GAWollman
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