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Message-Id: <200812191238.mBJCcplR056113@www.freebsd.org>
Date: Fri, 19 Dec 2008 12:38:51 GMT
From: "Eugene M. Zheganin" <emz@norma.perm.ru>
To: freebsd-gnats-submit@FreeBSD.org
Subject: after 'umount -f' of a stale NFS share FreeBSD locks up
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>Number:         129760
>Category:       kern
>Synopsis:       [nfs] after 'umount -f' of a stale NFS share FreeBSD locks up
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-fs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 19 12:40:00 UTC 2008
>Closed-Date:    
>Last-Modified:  Sat Dec 20 03:40:00 UTC 2008
>Originator:     Eugene M. Zheganin
>Release:        7.1-PRERELEASE
>Organization:
Norma JSC.
>Environment:
FreeBSD elm.norma.com. 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #0: Tue Dec 16 16:23:33 YEKT 2008     emz@ravenholm.hq.norma.perm.ru:/usr/obj/usr/src/sys/GENERIC  i386
>Description:
I got a FreeBSD with some NFS shares mounted from the network. I decided to change its IP but forgot to umount NFS shares.

When trying to 'umount /mountpoint-of-a-nfs-share' without -f I got mount hanged up infinitely.
After successful umount -f I got the inability to log in via ssh, hanged up midnight commander, and 'reboot', issued from local console also hanged up. (Probably some other side effects had place too).

>How-To-Repeat:
Repeat similar actions.
>Fix:


>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->freebsd-fs 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Fri Dec 19 12:44:33 UTC 2008 
Responsible-Changed-Why:  
Over to maintainer(s). 

http://www.freebsd.org/cgi/query-pr.cgi?pr=129760 

From: "Garrett Cooper" <yanefbsd@gmail.com>
To: "Eugene M. Zheganin" <emz@norma.perm.ru>
Cc: freebsd-gnats-submit@freebsd.org
Subject: Re: bin/129760: after 'umount -f' of a stale NFS share FreeBSD locks up
Date: Fri, 19 Dec 2008 19:31:38 -0800

 This has been an outstanding issue with FreeBSD that's only been fixed
 recently in OSX. Maybe it deserves a backport?
 -Garrett
>Unformatted:
