From owner-freebsd-stable  Thu Feb 18 17:49:40 1999
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To: Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>
Cc: Ted Spradley <tsprad@set.spradley.tmi.net>,
	Bjoern Fischer <bfischer@Techfak.Uni-Bielefeld.DE>,
	Matthew Dillon <dillon@apollo.backplane.com>,
	freebsd-stable@FreeBSD.ORG
Subject: Re: no dirty bufs panics any more... 
In-reply-to: Your message of "Thu, 18 Feb 1999 15:50:25 -0800."
             <199902182350.PAA15994@passer.osg.gov.bc.ca> 
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Date: Fri, 19 Feb 1999 14:46:53 +1300
From: Andrew McNaughton <andrew@squiz.co.nz>
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> A quick and dirty circumvention might be to put the following in 
> rc.shutdown until the root cause of the panics can be found and 
> fixed.  I use something similar to this to unmount NFS filesystems 
> to avoid a panic during 2.2 shutdown.
> 
> # Quick and dirty fix for dirty buffer panic during shutdown
> for I in `df -tmfs | awk 'NR > 1 {print $6}'`; do
>     for J in `fstat -f $I | awk 'NR > 1 {print $3}'`; do
> 	kill $J
>     done
> done
> sleep 20
> for I in `df -tmfs | awk 'NR > 1 {print $6}'`; do
>     for J in `fstat -f $I | awk 'NR > 1 {print $3}'`; do
> 	kill -9 $J
>     done
> done
> sleep 10
> umount -vatmfs || echo MFS umount failed.


It appears that a kill -9 gets ignored if there's still files open on the mfs.

Other than killing  the process, how do you umount a manually started mfs?


root@aniwa# df
Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
/dev/wd0s2a     63567    27946    30536    48%    /
/dev/wd0s2e     47183       59    43350     0%    /tmp
/dev/wd0s2g   1985343  1760125    66391    96%    /usr
/dev/wd0s2f     98479     7395    83206     8%    /var
procfs              4        4        0   100%    /proc
mfs:24448       15007      625    13182     5%    /home/andrew/test/mfs
root@aniwa# umount /home/andrew/test/mfs
umount: /usr/home/andrew/test/mfs: not currently mounted
root@aniwa# umount mfs:24448
umount: /usr/src/usr.sbin/pwd_mkdb/mfs:24448: not currently mounted



Andrew



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