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Date: Sun, 9 May 2004 11:26:20 -0700 (PDT)
From: Kip Macy <kmacy@fsmware.com>
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To: Jonathan <j.e.drews@worldnet.att.net>
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cc: FreeBSD Current <freebsd-current@freebsd.org>
Subject: Re: vinvalbuf panic while shutting down
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I don't know of any file system that supports hot-removal of its backing
device.

				-Kip

On Sun, 9 May 2004, Jonathan wrote:

> FreeBSD 5.2-CURRENT #0: Sat May 8 17:45:59 CDT 2004
>
> Hi:
>
>  I get a kernel panic when I deliberately remove a umass storage device
> that is still mounted. The machine panics after the halt command. I
> recopied these messages.
>
>
> umass0: at uhb1 port 2 (addr 2) disconnected
> (pass0:umass-sim0:0:0:0): lost device
> (pass0:umass-sim0:0:0:0): removing device entry
> (pass0:umass-sim0:0:0:0): lost device
> umass0: detached
>
> Fatal trap 12: page fault while in kernel mode
> fault virtual address   =0xb9a558c0
> fault code     = supervisor write, page not present
> instruction pointer   = 0x8:0xc04437cb
> stack pointer  =  0x10:0xd6bebaa8
> frame pointer  =  0x10:0xd6bebaac
> code segement = base 0x0, limit 0xfffff, type 0x1b
>               = DPL 0, pres 1, def32 1, gran 1
> processor eflags = interrupt enabled, resume, IOPL = 0
> current process = 1 (init)
> trap number = 12
> panic: page fault
> at line 815 in file /usr/src/sys/i386/i386/trap.c
>
>
>
>
>
>
> On Wed, 2004-04-28 at 00:14, Jonathan wrote:
> > uname: 5.2-CURRENT #0: Sun Apr 25 22:37 CDT
> > i386
> > compiled using std make.conf ( only -O for optimization)
> >
> >
> > While shutting down my FreeBSD laptop, I got this panic:
> >
> > panic: vinvalbuf: dirty bufs
> > at line 921 in file /usr/src/sys/kern/vfs_subr.c
> >
> > I had just detached a USB mass storage device (umass) and then given the
> > command "halt", when the panic happened. I may have forgotten to do
> > umount /mnt, which may have caused the panic ? FreeBSD CURRENT has
> > worked fine beside this first panic.
>
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