From owner-freebsd-current Mon Feb 15 16:04:14 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA26649 for freebsd-current-outgoing; Mon, 15 Feb 1999 16:04:14 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA26644 for ; Mon, 15 Feb 1999 16:04:11 -0800 (PST) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id KAA07513; Tue, 16 Feb 1999 10:33:56 +1030 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.3/8.9.0) id KAA21129; Tue, 16 Feb 1999 10:33:49 +1030 (CST) Message-ID: <19990216103348.M2207@lemis.com> Date: Tue, 16 Feb 1999 10:33:48 +1030 From: Greg Lehey To: Luoqi Chen , current@FreeBSD.ORG, khetan@iafrica.com Subject: Re: Problems in VM structure ? References: <199902152300.SAA15708@lor.watermarkgroup.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.93.2i In-Reply-To: <199902152300.SAA15708@lor.watermarkgroup.com>; from Luoqi Chen on Mon, Feb 15, 1999 at 06:00:16PM -0500 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Monday, 15 February 1999 at 18:00:16 -0500, Luoqi Chen wrote: >> Hi. >> >> I saw that my 4-CURRENT box from 8 February dropped to ddb >> after my last make world. I rebuilt world today, and the >> same problem is occuring. These problems started occuring >> after Matt Dillon's changes to the VM system. >> >> What is worrying/troubling is that in single user mode, >> the machine is stable, and manages to build world without >> a problem. When booted into multi-user mode, it's stable >> and usable for anywhere from 1 to 3 hours, and then >> panics. There are no active users on at the time, and the >> machine is not heavily loaded (0.0-0.2) >> >> I suspected a hardware error, so swopped all the RAM from a >> production machine, and it still produces the same fault. >> >> The error is >> panic: vm_fault: fault on nofault entry, addr : f2572000 > > This indicates an unmapped struct buf, should be a software bug. > >> Debugger ("panic") >> Stopped at Debuger+0x37: movl $0,in_Debugger >> >> When I hit c, I get this : >> > Could you type in "bt" next time this happens, and post the result? It's "t" in ddb, not "bt". Isn't consistency wonderful? Khetan, you should also take a dump. The backtrace is a good start, but it probably won't be enough to solve the problem. Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message