From owner-freebsd-stable@FreeBSD.ORG Thu Dec 23 08:19:25 2004 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E6F4116A4CE for ; Thu, 23 Dec 2004 08:19:25 +0000 (GMT) Received: from mail06.syd.optusnet.com.au (mail06.syd.optusnet.com.au [211.29.132.187]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2351543D48 for ; Thu, 23 Dec 2004 08:19:25 +0000 (GMT) (envelope-from PeterJeremy@optushome.com.au) Received: from cirb503493.alcatel.com.au (c211-30-75-229.belrs2.nsw.optusnet.com.au [211.30.75.229]) iBN8JJUf001051 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO); Thu, 23 Dec 2004 19:19:20 +1100 Received: from cirb503493.alcatel.com.au (localhost.alcatel.com.au [127.0.0.1])iBN8JJxP005949; Thu, 23 Dec 2004 19:19:19 +1100 (EST) (envelope-from pjeremy@cirb503493.alcatel.com.au) Received: (from pjeremy@localhost)iBN8JJS0005948; Thu, 23 Dec 2004 19:19:19 +1100 (EST) (envelope-from pjeremy) Date: Thu, 23 Dec 2004 19:19:19 +1100 From: Peter Jeremy To: Benjamin Lutz Message-ID: <20041223081918.GA5824@cirb503493.alcatel.com.au> References: <200412230408.48770.benlutz@datacomm.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200412230408.48770.benlutz@datacomm.ch> User-Agent: Mutt/1.4.2i cc: freebsd-stable@freebsd.org Subject: Re: slow system freeze X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Dec 2004 08:19:26 -0000 On Thu, 2004-Dec-23 04:08:39 +0100, Benjamin Lutz wrote: >I'm having a Problem with FreeBSD 5.3 here. The system slowly freezes. > >It starts with one application that just locks up. Other applications >still work, but when I switch to them and do stuff in them, they usually >lock up after a few seconds as well. Starting new processes or logging in >at a physical console does not work anymore, and after about 30 secs the >whole system is frozen. Nothing is printed to the first physical console >or the logs. This has happened both under load and while the system was >mostly idle (just me irc'ing). Can you do a 'ps axl' as the system freezes. Of particular interest would be the WCHAN for the frozen processes. What still works when the system is frozen? Can you switch VTYs? Do ping's work (from another system)? To actually solve the problem, you're going to need to enable DDB. See http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html Again, a "ps" with the system frozen is the first step. -- Peter Jeremy