Date: Tue, 14 Dec 1999 09:58:32 -0600 From: Dan Nelson <dnelson@emsphone.com> To: Mark Newton <newton@internode.com.au> Cc: mauzi@poli.hu, freebsd-hackers@FreeBSD.ORG Subject: Re: umount -f causes page fault in kernel? Message-ID: <19991214095832.A33777@dan.emsphone.com> In-Reply-To: <19991214164126.C1587@internode.com.au>; from "Mark Newton" on Tue Dec 14 16:41:26 GMT 1999 References: <Pine.BSF.4.10.9912131623050.319-100000@aquarius.poli.hu> <19991214164126.C1587@internode.com.au>
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In the last episode (Dec 14), Mark Newton said: > On Mon, Dec 13, 1999 at 04:27:48PM +0100, Gergely EGERVARY wrote: > > mount /cdrom > > cd /cdrom > > umount -f /cdrom > > cd .. > > will cause 100% reproduceable kernel panic (page fault) > > "So don't do that then!" > > > I know forced umount is dangerous, but soo ... =P > > It's described as "dangerous" precisely because it causes a kernel > panic. Well, it actually *shouldn't* cause a kernel panic. I know I've forcibly unmounted filesystems with no problems. Gergely: could you rebuild your kernel with debugging, create a kernel crashdump, and post a stack traceback of the panic? Instructions are at http://www.freebsd.org/handbook/kerneldebug.html . -- Dan Nelson dnelson@emsphone.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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