NetBSD Problem Report #40472

From bernd@arresum.veego.de  Sun Jan 25 09:35:51 2009
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Date: Sun, 25 Jan 2009 10:35:40 +0100 (CET)
From: Bernd Ernesti <pr200904@veego.de>
Reply-To: Bernd Ernesti <pr200904@veego.de>
To: gnats-bugs@gnats.NetBSD.org
Subject: umounting an async fs fails
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>Number:         40472
>Category:       kern
>Synopsis:       umounting an async fs fails
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jan 25 09:40:00 +0000 2009
>Closed-Date:    Fri Sep 30 08:39:09 +0000 2016
>Last-Modified:  Fri Sep 30 08:39:09 +0000 2016
>Originator:     Bernd Ernesti
>Release:        NetBSD 5.99.7 22-01-2009
>Organization:
>Environment:
System: NetBSD 5.99.7
Architecture: i386
Machine: i386
>Description:
	I have a async mounted filesystem which can't be unmounted, even
	if it has no files on it, just after a newfs -O 2

	That fs is mounted on top of a wapbl fs.
>How-To-Repeat:

	Use the following /etc/fstab entries and boot with it:
/dev/raid0h	/source		ffs	rw,log		1	3
/dev/wd2e	/source/work	ffs	rw,async	1	3

	The root fs is also a wapbl fs.

	Execute:
		umount /source/work
	and notice that it doesn't return.

USER    PID %CPU %MEM  VSZ   RSS TTY    STAT STARTED     TIME COMMAND   UID PID PPID   CPU PRI NI  VSZ   RSS WCHAN    STAT TTY        TIME COMMAND
root    560 99.0  0.0  748   736 ttyp0  O+   10:01AM 19:05.90 umount      0 560  492 36864  76  0  748   736 -        O+   ttyp0  19:05.90 umount 

	mount shows that the filesystem is gone, but a reboot still prints that
	it tries to unmount this filesystem and hangs there.


>Fix:

>Release-Note:

>Audit-Trail:

State-Changed-From-To: open->feedback
State-Changed-By: pooka@NetBSD.org
State-Changed-When: Tue, 29 Jun 2010 20:56:58 +0300
State-Changed-Why:
I can't repeat this.  Does it still happen?  If so, please try
to be a little more specific as to what exactly triggers it (async, log,
raid, disk size, what?)


State-Changed-From-To: feedback->closed
State-Changed-By: dholland@NetBSD.org
State-Changed-When: Fri, 30 Sep 2016 08:39:09 +0000
State-Changed-Why:
six-year feedback timeout.
(yes, really)


>Unformatted:

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