>Number: 145750
>Category: kern
>Synopsis: unionfs locks the machine
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Apr 16 07:20:00 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator: Harald Schmalzbauer
>Release: FreeBSD 8.0-RELEASE-p2 amd64
>Organization:
>Environment:
System: FreeBSD devweb.dmz.sand.spsnetz.de 8.0-RELEASE-p2 FreeBSD
8.0-RELEASE-p2 #2: Fri Feb 5 15:06:19 CET 2010
ad...@devweb.dmz.sand.spsnetz.de:/usr/obj/usr/src/sys/DELL-PE840 amd64
>Description:
There are several LORs with unionfs reported. One seems to lead to a
hard lock.
For example I used to mount /usr/local/etc via unionfs over read-only
unerlaying ufs.
There are reproducably hanging processes with status D+ ofter a short time.
This used to work with FreeBSD-7, but also causes problems on -current (see
kern/141950)
>How-To-Repeat:
mount_unionfs /somedir/anotherdir /usr/local/etc and try starting
lighttpd
with php-fastcgi for example.
mount_unionfs /somedir /root while / is readonly. Su will hang and force yout
to hard reset the machine.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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