>Number:         9944
>Category:       kern
>Synopsis:       panic: lockmgr: locking against myself
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Apr 20 14:44:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     
>Release:        <NetBSD-current source date>1.4.2
>Organization:
Redback Networks
	
>Environment:
	
System: NetBSD fartmangler.redback.com 1.4.2 NetBSD 1.4.2 (EQUITY) #5: Thu Mar 23 12:49:57 PST 2000 dogcow@admin:/build/nbsrc/1.4.2/syssrc/sys/arch/i386/compile/EQUITY i386


>Description:
	
In the middle of the night, under heavy NFS build conditions, machines will
panic and reboot with panic: lockmgr: locking against myself
>How-To-Repeat:
	
gdb gives this backtrace:

#0  0xc013bf45 in lockstatus ()
#1  0xc020c4bf in cpu_reboot ()
#2  0xc0148191 in panic ()
#3  0xc013c2d2 in lockmgr ()
#4  0xc01f7332 in ufs_lock ()
#5  0xc0165fcb in vn_lock ()
#6  0xc015ff76 in vrele ()
#7  0xc01c9fc7 in nfs_lookup ()
#8  0xc015eb64 in lookup ()
#9  0xc015e853 in namei ()
#10 0xc0165440 in vn_open ()
#11 0xc016278a in sys_open ()
#12 0xc0213682 in syscall ()

I'm going to build a kernel with debugging symbols, and see if I can get
more info. 

>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: