From owner-freebsd-scsi@FreeBSD.ORG Wed Aug 6 19:46:37 2014 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id BC66DCCE; Wed, 6 Aug 2014 19:46:37 +0000 (UTC) Received: from hergotha.csail.mit.edu (wollman-1-pt.tunnel.tserv4.nyc4.ipv6.he.net [IPv6:2001:470:1f06:ccb::2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 5CC5D2BD4; Wed, 6 Aug 2014 19:46:36 +0000 (UTC) Received: from hergotha.csail.mit.edu (localhost [127.0.0.1]) by hergotha.csail.mit.edu (8.14.7/8.14.7) with ESMTP id s76JkYrY078648; Wed, 6 Aug 2014 15:46:34 -0400 (EDT) (envelope-from wollman@hergotha.csail.mit.edu) Received: (from wollman@localhost) by hergotha.csail.mit.edu (8.14.7/8.14.4/Submit) id s76JkYY6078645; Wed, 6 Aug 2014 15:46:34 -0400 (EDT) (envelope-from wollman) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <21474.34330.572142.206098@hergotha.csail.mit.edu> Date: Wed, 6 Aug 2014 15:46:34 -0400 From: Garrett Wollman To: freebsd-stable@freebsd.org Subject: 9.3-RELEASE still instapanics on multi-mps(4) servers X-Mailer: VM 7.17 under 21.4 (patch 22) "Instant Classic" XEmacs Lucid X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (hergotha.csail.mit.edu [127.0.0.1]); Wed, 06 Aug 2014 15:46:34 -0400 (EDT) X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED, HEADER_FROM_DIFFERENT_DOMAINS autolearn=disabled version=3.4.0 X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on hergotha.csail.mit.edu Cc: freebsd-scsi@freebsd.org X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Aug 2014 19:46:37 -0000 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