Date: Fri, 16 Apr 2010 09:10:21 +0200 (CEST) From: Harald Schmalzbauer <freebsd@omnilan.de> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/145750: unionfs locks the machine Message-ID: <201004160710.o3G7ALOe001986@titan.flintsbach.schmalzbauer.de> Resent-Message-ID: <201004160720.o3G7K1Fc011104@freefall.freebsd.org>
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>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 admin@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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