Date: Wed, 18 Feb 2009 10:44:31 -0900 From: Mel <fbsd.questions@rachie.is-a-geek.net> To: freebsd-questions@freebsd.org, Polytropon <freebsd@edvax.de> Subject: Re: Determining process preventing umount of busy partition Message-ID: <200902181044.31941.fbsd.questions@rachie.is-a-geek.net> In-Reply-To: <20090218160752.20522f26.freebsd@edvax.de> References: <20090212062505.ca66b93e.freebsd@edvax.de> <200902171330.55677.fbsd.questions@rachie.is-a-geek.net> <20090218160752.20522f26.freebsd@edvax.de>
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On Wednesday 18 February 2009 06:07:52 Polytropon wrote:
> On Tue, 17 Feb 2009 13:30:55 -0900, Mel
<fbsd.questions@rachie.is-a-geek.net> wrote:
> > This is weird, though. New theories (where are Chase, Cameron and Foreman
> > when you need them!):
>
> Spying around in someone else's house. :-)
>
> > fstat is lying, instead use:
> > fstat -f /usr -m -v
>
> Well, I've taken that pill. This is the result:
>
> # /root/bin/fstat -m -v -f /usr
> USER CMD PID FD MOUNT INUM MODE SZ|DV R/W
> # _
>
> It shows NOTHING. I have made a copy of fstat binary in /root/bin,
> which is possible because all needed libs are in /.
Well, that rules that out.
> Furthermore, I've carefully studied the output of "ps ax" and even
> of "top -t", but as well, nothing that indicates some activity on
> /usr...
>
> > You have a mount on top of /usr, ie.: /usr/local or /usr/ports.
>
> No. From /etc/fstab:
>
> # Device Mountpoint FStype Options Dump
> Pass# # ----------- --------------------- ------ ------------- -----
> ----- /dev/ad0s1b none swap sw 0
> 0 /dev/ad0s1a / ufs rw 1
> 1 /dev/ad0s1d /tmp ufs rw 2
> 2 /dev/ad0s1e /var ufs rw 2 2
> /dev/ad0s1f /usr ufs rw 2 2
> /dev/ad0s1g /export/home ufs rw 2 2
>
> These are the only partitions on ad0. /usr has its own partition,
> nothing mounted "on top" of it. (You mentioned a valid point: I
> sometimes have another disk mounted inside /export/home, and I
> cannot umount /export/home while this partition is mounted. But
> that's not the case here.)
Can you show mount -p before trying to unmount /usr? On the off-chance /export
or /export/home is really a symlink to /usr/home (mount -p shows realpath(3)
for mounts).
> This is REALLY strange, I should get a whiteboard, some pens and
> start making a drawing of the symptoms, until Dr. Cuddy tells me
> not to do so. :-)
Lol, I'm actually enclined to talk to Wilson, since this smells like something
up his alley (and free lunch).
--
Mel
Problem with today's modular software: they start with the modules
and never get to the software part.
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