>Number:         18975
>Category:       kern
>Synopsis:       lfs_bmapv + dounmount deadlock
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Nov 08 08:55:05 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
>Release:        NetBSD 1.6K
>Organization:

>Environment:
	
	
System: NetBSD kaeru 1.6K NetBSD 1.6K (build.kaeru) #170: Sat Nov 9 00:41:22 JST 2002 takashi@kaeru:/usr/home/takashi/work/kernel/build.kaeru i386
Architecture: i386
Machine: i386
>Description:
	1. cleaner thread calls lfs_bmapv. it calls vfs_busy.
	2. another thread set MNT_UNMOUNT in dounmount.
	3. cleaner thread wakes up and vfs_busy again in getnewvnode.
	4. => deadlock
>How-To-Repeat:
	try to unmount a lfs partition when cleaner is active.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: