From owner-freebsd-stable@FreeBSD.ORG Tue Jan 26 15:37:55 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BF56110656AC; Tue, 26 Jan 2010 15:37:55 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id 93F5A8FC0C; Tue, 26 Jan 2010 15:37:55 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id 47F6F46B2C; Tue, 26 Jan 2010 10:37:55 -0500 (EST) Received: from jhbbsd.localnet (smtp.hudson-trading.com [209.249.190.9]) by bigwig.baldwin.cx (Postfix) with ESMTPA id 238938A021; Tue, 26 Jan 2010 10:37:54 -0500 (EST) From: John Baldwin To: freebsd-stable@freebsd.org Date: Tue, 26 Jan 2010 09:46:44 -0500 User-Agent: KMail/1.12.1 (FreeBSD/7.2-CBSD-20100120; KDE/4.3.1; amd64; ; ) References: <20100126073336.GA1955@server.vk2pj.dyndns.org> In-Reply-To: <20100126073336.GA1955@server.vk2pj.dyndns.org> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <201001260946.44977.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (bigwig.baldwin.cx); Tue, 26 Jan 2010 10:37:54 -0500 (EST) X-Virus-Scanned: clamav-milter 0.95.1 at bigwig.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=4.2 tests=AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on bigwig.baldwin.cx Cc: marius@freebsd.org, Peter Jeremy Subject: Re: uma_zalloc_arg complaining about non-sleepable locks X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Jan 2010 15:37:55 -0000 On Tuesday 26 January 2010 2:33:37 am Peter Jeremy wrote: > I have just upgraded to 8-STABLE/amd64 from about 18 hours ago and am > now getting regular (the following pair of messages about every > minute) compaints as follows: > > kernel: uma_zalloc_arg: zone "mbuf" with the following non-sleepable locks held: > kernel: exclusive sleep mutex sp_lock (sp_lock) r = 0 (0xffffff000460bb00) locked @ /usr/src/sys/rpc/svc.c:1098 > kernel: KDB: stack backtrace: > kernel: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a > kernel: _witness_debugger() at _witness_debugger+0x2c > kernel: witness_warn() at witness_warn+0x2c2 > kernel: uma_zalloc_arg() at uma_zalloc_arg+0x29d > kernel: nfs_realign() at nfs_realign+0x5f > kernel: fha_assign() at fha_assign+0x2d8 > kernel: svc_run_internal() at svc_run_internal+0x1ee > kernel: svc_thread_start() at svc_thread_start+0xb > kernel: fork_exit() at fork_exit+0x112 > kernel: fork_trampoline() at fork_trampoline+0xe > kernel: --- trap 0xc, rip = 0x80069e04c, rsp = 0x7fffffffe6d8, rbp = 0x5 --- > kernel: uma_zalloc_arg: zone "mbuf" with the following non-sleepable locks held: > kernel: exclusive sleep mutex sp_lock (sp_lock) r = 0 (0xffffff000460bb00) locked @ /usr/src/sys/rpc/svc.c:1098 > kernel: KDB: stack backtrace: > kernel: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a > kernel: _witness_debugger() at _witness_debugger+0x2c > kernel: witness_warn() at witness_warn+0x2c2 > kernel: uma_zalloc_arg() at uma_zalloc_arg+0x29d > kernel: nfs_realign() at nfs_realign+0x5f > kernel: fha_assign() at fha_assign+0x2d8 > kernel: svc_run_internal() at svc_run_internal+0x1ee > kernel: svc_thread_start() at svc_thread_start+0xb > kernel: fork_exit() at fork_exit+0x112 > kernel: fork_trampoline() at fork_trampoline+0xe > kernel: --- trap 0xc, rip = 0x80069e04c, rsp = 0x7fffffffe6d8, rbp = 0x5 --- > > It looks like NFS is missing some lock/unlock pairs. Has anyone else > seen this? And does anyone have a fix? I suspect this was caused by the recent alignment fixes to NFS. I've cc'd Marius. -- John Baldwin