From owner-freebsd-current@FreeBSD.ORG Wed Dec 17 14:12:41 2008 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id F0C481065675 for ; Wed, 17 Dec 2008 14:12:41 +0000 (UTC) (envelope-from onemda@gmail.com) Received: from mail-gx0-f10.google.com (mail-gx0-f10.google.com [209.85.217.10]) by mx1.freebsd.org (Postfix) with ESMTP id AC7E88FC14 for ; Wed, 17 Dec 2008 14:12:41 +0000 (UTC) (envelope-from onemda@gmail.com) Received: by gxk3 with SMTP id 3so287101gxk.19 for ; Wed, 17 Dec 2008 06:12:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=SUMB7f4P5PeeX4UbfKRhNcYjLKmtvk8vtFqP32j+PYs=; b=LKfFGBh1k4pR3yDBtrOu0rt8DRSAKT7Zp4rrrhHiPuyF36VIap5foBjhHcPCQVx4Nt /GPdVMIJtI0IXGdUYkFKbX8m5omhr1httPhlsChBN8gyw4RnCjYIVMXjwg8aTBKSSqdv 3NUfhJ0iucYDvr2XBMKVeFd7/OSyRvOtVM1HE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=CpHSSnbfB5V0sPdxGYAyjmzQ0VkSPpiYh+49ArVfgCsAoRumYUDt9EFJXaMxuIAZCA woIksYUPdjenWrN96ipuOYTutTaJNtbqPD6+fwZy9H9rUEMCvQuwIxnnNJkonDbM/Xci +HIPlcvJTQrXp0y95q4q1Oz1Crmq7T7Li8/w8= Received: by 10.231.15.74 with SMTP id j10mr7349iba.10.1229523160749; Wed, 17 Dec 2008 06:12:40 -0800 (PST) Received: by 10.231.16.202 with HTTP; Wed, 17 Dec 2008 06:12:40 -0800 (PST) Message-ID: <3a142e750812170612j1d656284s20c65542b85578eb@mail.gmail.com> Date: Wed, 17 Dec 2008 15:12:40 +0100 From: "Paul B. Mahol" To: "Alexey Shuvaev" In-Reply-To: <20081217100406.GA1595@wep4035.physik.uni-wuerzburg.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <4947C526.2080702@citrin.ru> <20081217100406.GA1595@wep4035.physik.uni-wuerzburg.de> Cc: freebsd-current@freebsd.org Subject: Re: hangup (livelock) - db> prompt in endless loop 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: Wed, 17 Dec 2008 14:12:42 -0000 On 12/17/08, Alexey Shuvaev wrote: > On Tue, Dec 16, 2008 at 06:11:34PM +0300, Anton Yuzhaninov wrote: >> My box with fresh current sometimes stops to respond. >> >> On screen in endless loop printed debugger prompt >> >> db> >> >> but I can't type anything here. >> >> Alt+Ctrl+Esc and Alt+Ctrl+Del don't stops this loop. >> >> How I can debug this problem? >> >> system: current from Mon Dec 15 16:16:23 MSK 2008 with GENERIC kernel, >> amd64, SMP. >> > Me too! > > The system is: > # uname -a > FreeBSD wep4035 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Mon Dec 15 14:21:48 CET > 2008 > root@wep4035:/usr/obj/usr/src/sys/USB2 amd64 > > It can hang even in single user mode with only / mounted read-only, > but with already configured network (msk). I have never seen how it > happens, however :( Looks like syscons problem, does it happen with kern.smp.disabled=1? -- Paul