Subject: kern/32367: umount -f deadlock
To: None <kern-bug-people@netbsd.org, gnats-admin@netbsd.org,>
From: None <yamt@mwd.biglobe.ne.jp>
List: netbsd-bugs
Date: 12/23/2005 13:55:00 
>Number:         32367
>Category:       kern
>Synopsis:       umount -f deadlock
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Dec 23 13:55:00 +0000 2005
>Originator:     YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
>Release:        NetBSD 3.99.14
>Organization:

>Environment:
	
	
System: NetBSD kaeru 3.99.14 NetBSD 3.99.14 (build.kaeru.xen.nodebug) #35: Wed Dec 21 22:05:16 JST 2005 takashi@kaeru:/usr/home/takashi/work/kernel/build.kaeru.xen.nodebug i386
Architecture: i386
Machine: i386
>Description:
	umount marks the mount point IMNT_UNMOUNT and then
	does vflush() -> vgonel() -> VOP_LOCK().
	OTOH, eg. lookup does getnewvnode() -> vfs_busy() with
	the parent vnode locked.
>How-To-Repeat:
	code inspection.
>Fix:
	

>Unformatted: