From owner-freebsd-fs@FreeBSD.ORG Tue Oct 16 12:49:20 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 08817120 for ; Tue, 16 Oct 2012 12:49:20 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from bigwig.baldwin.cx (bigknife-pt.tunnel.tserv9.chi1.ipv6.he.net [IPv6:2001:470:1f10:75::2]) by mx1.freebsd.org (Postfix) with ESMTP id D16418FC16 for ; Tue, 16 Oct 2012 12:49:19 +0000 (UTC) Received: from jhbbsd.localnet (unknown [209.249.190.124]) by bigwig.baldwin.cx (Postfix) with ESMTPSA id 2F8E5B983; Tue, 16 Oct 2012 08:49:19 -0400 (EDT) From: John Baldwin To: freebsd-fs@freebsd.org Subject: Re: I have a DDB session open to a crashed ZFS server Date: Tue, 16 Oct 2012 08:44:41 -0400 User-Agent: KMail/1.13.5 (FreeBSD/8.2-CBSD-20110714-p20; KDE/4.5.5; amd64; ; ) References: <1350317019.71982.50.camel@btw.pki2.com> In-Reply-To: <1350317019.71982.50.camel@btw.pki2.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201210160844.41042.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.7 (bigwig.baldwin.cx); Tue, 16 Oct 2012 08:49:19 -0400 (EDT) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Oct 2012 12:49:20 -0000 On Monday, October 15, 2012 12:03:39 pm Dennis Glatting wrote: > FreeBSD/amd64 (mc) (ttyu0) > > login: NMI ... going to debugger > [ thread pid 11 tid 100003 ] You got an NMI, not a crash. What happens if you just continue ('c' command) from DDB? I have heard of machines sending spurious NMIs in the past. If that is what you are seeing, there is a sysctl to disable dropping into DDB due to an NMI: machdep.kdb_on_nmi: 1 If you keep getting NMIs, try setting that to 0. -- John Baldwin