From owner-freebsd-current@FreeBSD.ORG Mon May 10 20:53:33 2010 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id CB4C01065670 for ; Mon, 10 May 2010 20:53:33 +0000 (UTC) (envelope-from asmrookie@gmail.com) Received: from mail-fx0-f54.google.com (mail-fx0-f54.google.com [209.85.161.54]) by mx1.freebsd.org (Postfix) with ESMTP id 57D858FC0C for ; Mon, 10 May 2010 20:53:33 +0000 (UTC) Received: by fxm15 with SMTP id 15so3322160fxm.13 for ; Mon, 10 May 2010 13:53:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:sender:received :in-reply-to:references:date:x-google-sender-auth:message-id:subject :from:to:cc:content-type:content-transfer-encoding; bh=5IhIGxnMwQBX2GvDHJPd35J9m3OFXZbQM3jv3Z+4cUE=; b=vqrgpDxgB/RsLnQZH0XrXHbBUvj6SF3znBvGTRrZ/EFqh67/pFajByZ9A9NXt9OH8n GBsSarAboGK40DDstQ2uvHiQ/nroLzbd9KeT8HJ0BFqoPZZMNO7p4m41NUxmxEBZH+2C auaSTVvIbRsDFuchHF5fSUzGd+XgrtYs3qp6A= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=dU6cHWyiYj6+PpcQJGFPAASRRKZrb5txpAsZ4O79e0+7QJn96/z2JRMGZGWs1dLciJ w0TevIFhYbOZvrvtXUpAvAcQjDMAwAvFA0rns/SnOSz9SdB3auQIUQLV73kGlKeNmThZ +mgTzZqdr0Pylwz+2t+zf3SRIKPo75vfn2z7Q= MIME-Version: 1.0 Received: by 10.239.190.83 with SMTP id w19mr397086hbh.144.1273524812199; Mon, 10 May 2010 13:53:32 -0700 (PDT) Sender: asmrookie@gmail.com Received: by 10.239.129.207 with HTTP; Mon, 10 May 2010 13:53:32 -0700 (PDT) In-Reply-To: <20100510061057.GA93038@server.vk2pj.dyndns.org> References: <20100508102005.GB1867@elmar.spoerlein.net> <20100510061057.GA93038@server.vk2pj.dyndns.org> Date: Mon, 10 May 2010 22:53:32 +0200 X-Google-Sender-Auth: ba0e602dacd1c496 Message-ID: From: Attilio Rao To: Peter Jeremy Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: current@freebsd.org Subject: Re: LOR: ufs vs bufwait X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 May 2010 20:53:33 -0000 2010/5/10 Peter Jeremy : > On 2010-May-08 12:20:05 +0200, Ulrich Sp=C3=B6rlein w= rote: >>This LOR also is not yet listed on the LOR page, so I guess it's rather >>new. I do use SUJ. >> >>lock order reversal: >> 1st 0xc48388d8 ufs (ufs) @ /usr/src/sys/kern/vfs_lookup.c:502 >> 2nd 0xec0fe304 bufwait (bufwait) @ /usr/src/sys/ufs/ffs/ffs_softdep.c:11= 363 >> 3rd 0xc49e56b8 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2091 > > I'm seeing exactly the same LOR (and subsequent deadlock) on a recent > -current without SUJ. I think this LOR was reported since a long time. The deadlock may be new and someway related to the vm_page_lock work (if not SUJ). Attilio --=20 Peace can only be achieved by understanding - A. Einstein