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Date: Wed, 30 Nov 2005 14:03:46 +0300
From: Ivan Kolosovskiy <r4@sovietservers.com>
To: FreeBSD-gnats-submit@freebsd.org
Subject: Jailed process deadlocks when using unionfs

>Number:         89755
>Category:       kern
>Synopsis:       [unionfs] [hang] Jailed process deadlocks when using unionfs
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    daichi
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Nov 30 11:10:02 GMT 2005
>Closed-Date:    Tue Feb 13 06:06:20 GMT 2007
>Last-Modified:  Tue Feb 13 06:06:20 GMT 2007
>Originator:     Charlie &
>Release:        FreeBSD 6.0-RELEASE i386
>Organization:
agava
>Environment:
System: FreeBSD CRYO.SOVIETSERVERS.COM 6.0-RELEASE FreeBSD 6.0-RELEASE
#2: Sat Nov 19 13:04:26 MSK 2005 root@CRYO.SOVIETSERVERS.COM:/usr/s
Pentium-D 2.8 3xSCSI 34G 2G Ram


>Description:
sorry for bad english
I am using unionfs to create jail environment:

/usr                    /opt3/jail/ka6ah/usr    unionfs ro,noatime
0       0
/bin                    /opt3/jail/ka6ah/bin    unionfs ro,noatime
0       0
/lib                    /opt3/jail/ka6ah/lib    unionfs ro,noatime
0       0
/libexec                /opt3/jail/ka6ah/libexec        unionfs
ro,noatime      0       0
/sbin                   /opt3/jail/ka6ah/sbin   unionfs ro,noatime
0       0

When i start jail, jail processes deadlocks ("D" in ps), i cannot even
reboot after it.
Also after starting jail any process(non jailed) that trying to access
unionfs inside jail deadlocks too.



>How-To-Repeat:
try to make jail environment using nullfs, and start jail.

>Fix:







>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->suspended 
State-Changed-By: kris 
State-Changed-When: Wed Nov 30 19:40:30 GMT 2005 
State-Changed-Why:  
Unionfs is documented to have many problems, so suspend this PR 
until a suitable maintainer steps forward 

http://www.freebsd.org/cgi/query-pr.cgi?pr=89755 
Responsible-Changed-From-To: freebsd-bugs->daichi 
Responsible-Changed-By: rodrigc 
Responsible-Changed-When: Sun May 28 20:24:30 UTC 2006 
Responsible-Changed-Why:  
daichi is showing interest in unionfs 

http://www.freebsd.org/cgi/query-pr.cgi?pr=89755 
State-Changed-From-To: suspended->closed 
State-Changed-By: rodrigc 
State-Changed-When: Tue Feb 13 06:06:03 UTC 2007 
State-Changed-Why:  
New unionfs implementation has been committed to RELENG_6 and CURRENT. 
This bug report is only relevant to the previous version of unionfs. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=89755 
>Unformatted:
