From owner-freebsd-hackers Tue Mar 26 8:35:51 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mx01-a.netapp.com (mx01-a.netapp.com [198.95.226.53]) by hub.freebsd.org (Postfix) with ESMTP id F24D337B416 for ; Tue, 26 Mar 2002 08:35:45 -0800 (PST) Received: from frejya.corp.netapp.com (frejya [10.10.20.91]) by mx01-a.netapp.com (8.11.1/8.11.1/NTAP-1.2) with ESMTP id g2QGZG315519; Tue, 26 Mar 2002 08:35:16 -0800 (PST) Received: from orbit-fe.eng (localhost [127.0.0.1]) by frejya.corp.netapp.com (8.12.2/8.12.2/NTAP-1.4) with ESMTP id g2QGZFM2017479; Tue, 26 Mar 2002 08:35:15 -0800 (PST) Received: from localhost (kmacy@localhost) by orbit-fe.eng (8.11.6+Sun/8.11.6) with ESMTP id g2QGZFa17325; Tue, 26 Mar 2002 08:35:15 -0800 (PST) Date: Tue, 26 Mar 2002 08:35:14 -0800 (PST) From: Kip Macy To: Michael Lucas Cc: Apache Man , hackers@FreeBSD.ORG Subject: Re: kernel panic: vm_object_reference In-Reply-To: <20020326102340.A81834@blackhelicopters.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG No apologies neccessary :-). You may be right with respect to FreeBSD. In his BSD class Kirk describes a forcible unmount as a perfectly legitimate thing to do (albeit a bit traumatic for the users). It may just be a regression that crept in and, seeing as it is something that people seldom want to do, no one saw a need to fix it. -Kip > OK. That's not what I was told but back in 96 or so,but I suppose the > code is allowed to change. My apologies. :-) > > Could you please prepare a dump of this? See the developers' handbook > for details, or follow the pointers from the FAQ. Thanks! > > On Tue, Mar 26, 2002 at 07:20:37AM -0800, Kip Macy wrote: > > That is a bug. The system is supposed to iterate through all the vnodes hanging > > off the mount point and vgone them. According to Kirk at least this used to > > work. > > > > -Kip > > > > > > On Tue, 26 Mar 2002, Michael Lucas wrote: > > > > > Hello, > > > > > > Forcibly unmounting a file system that is in use will panic your > > > system. It's not exactly a bug, it's just how it works. :) > > > > > > On Tue, Mar 26, 2002 at 10:24:01AM +0200, Apache Man wrote: > > > > Hi. > > > > > > > > As i informed you earler the bug exists in freebsd 4.5. > > > > Kernel panics with `vm_object_reference: delay in getting object' > > > > when i copy files from a partition and at the same time dismount > > > > this partition (umount -f /cdrom). > > > > > > > > The sutuation is following. > > > > I mount /cdrom. Then start too many `cp' processes that copy > > > > some files from /cdrom. In other tty i umount -f /cdrom and > > > > kernel panics. > > > > > > > > Sorry if it's known bug. > > > > > > > > -- > > > > email: apache@ukr.net > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > > with "unsubscribe freebsd-hackers" in the body of the message > > > > > > -- > > > Michael Lucas mwlucas@FreeBSD.org, mwlucas@BlackHelicopters.org > > > my FreeBSD column: http://www.oreillynet.com/pub/q/Big_Scary_Daemons > > > > > > http://www.blackhelicopters.org/~mwlucas/ > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > with "unsubscribe freebsd-hackers" in the body of the message > > > > > -- > Michael Lucas mwlucas@FreeBSD.org, mwlucas@BlackHelicopters.org > my FreeBSD column: http://www.oreillynet.com/pub/q/Big_Scary_Daemons > > http://www.blackhelicopters.org/~mwlucas/ > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message