hi,
maybe i am wrong, but I really can't find any other process runing.
my step is:
1) "/" and "/usr" are busy
2) shut down to single user mode
3) "/" still busy
4) "/usr" can be unmounted, but can't mount -o ro,remount /usr, show busy error.
5) umount -a, after this, only /proc and / exist.
6) mount -o ro,remount /, show busy error.
I have mentioned I have used "ps aux" to check the process list,
there are no user process left. except the following: (repost)
root 1 0.1 0.7 1056 484 ? S 15:46 0:04 init [S]
root 2 0.0 0.0 0 0 ? SW 15:46 0:00 [keventd]
root 3 0.0 0.0 0 0 ? SWN 15:46 0:00 [ksoftirqd_CPU0]
root 4 0.0 0.0 0 0 ? SW 15:46 0:00 [kswapd]
root 5 0.0 0.0 0 0 ? SW 15:46 0:00 [bdflush]
root 6 0.0 0.0 0 0 ? SW 15:46 0:00 [kupdated]
root 1042 0.0 0.7 1056 484 tty1 S 16:33 0:00 init [S]
root 1043 0.6 1.5 1840 1004 tty1 S 16:33 0:00 /bin/sh
root 1045 0.0 1.0 2260 680 tty1 R 16:33 0:00 ps aux
and I also checked by fuser -v /usr,
only used by kernel.
and fuser -c /, show many process list above.
If i have a mistake, would you like to tell me where is the mistake?
thanks.
Regards;
Michael
On Wed, 6 Mar 2002 01:15:19 -0700
Andreas Dilger <adilger@clusterfs.com> wrote:
> On Mar 05, 2002 23:49 -0800, Mike Fedyk wrote:
> > On Wed, Mar 06, 2002 at 04:40:10PM +0900, Michael Cheung wrote:
> > > I have upgraded my kernel to version 2.4.
> > > And i have tested 2.4.16 and 2.4.18. Both of these
> > > two version have the same problem when system reboot.
> > > "/: device is busy";
> > > in shutdown script:
> > > umount -a
> > > mount -n -o ro,remount /
> > > these two line result error: device is busy.
> > >
> >
> > We need more info about your config. Do you have any patches in this
> > kernel? What modules have been loaded? Highmem? x86? drive controller?
> > drive? ram size? lspci output, etc...
>
> Please don't send that. It clearly appears to be a user problem.
> Order of operations, as I read in the original email:
> 1) "/" and "/usr" are busy
> 2) shut down to single user mode
> 3) "/" still busy
> 4) "/usr" can be unmounted
> 5) didn't check that root can be remounted after umounting "/usr"
>
> Clearly, some program is keeping "/usr" busy (which is keeping "/" busy)
> before the change to single user mode. Just a bit of "lsof" needed to
> find such things.
>
> Cheers, Andreas
> --
> Andreas Dilger
> http://sourceforge.net/projects/ext2resize/
> http://www-mddsp.enel.ucalgary.ca/People/adilger/
>
>
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