contemporary -current panic: locking against myself

From: Dmitry Morozovsky <marck_at_rinet.ru>
Date: Thu, 2 Aug 2007 15:58:26 +0400 (MSD)
Hi there colleagues,

FreeBSD/i386 on Athlon X2, HEAD without WITNESS. 4G of RAM. tmpfs used for 
'make release'.


panic: lockmgr: locking against myself
cpuid = 0
KDB: enter: panic
[thread pid 19396 tid 100245 ]
Stopped at      kdb_enter+0x32: leave

db> tr  
Tracing pid 19396 tid 100245 td 0xce194220
kdb_enter(c066f664,0,c066dca9,e92799cc,0,...) at kdb_enter+0x32
panic(c066dca9,e92799dc,c0559cc7,e9279ac0,ca2f7770,...) at panic+0x124
_lockmgr(ca2f77c8,3002,ca2f77f8,ce194220,c0675afc,...) at _lockmgr+0x401
vop_stdlock(e9279a5c,ce194220,3002,ca2f7770,e9279a80,...) at vop_stdlock+0x40
VOP_LOCK1_APV(d06417e0,e9279a5c,e9279bc0,0,c8d00330,...) at VOP_LOCK1_APV+0x46
_vn_lock(ca2f7770,3002,ce194220,c0675afc,7f3,...) at _vn_lock+0x166
vget(ca2f7770,1000,ce194220,0,e9279b98,...) at vget+0x114
vm_object_reference(d1c70348,e9279b30,c063f81d,c0c71000,e381d000,...) at 
vm_object_reference+0x12a
kern_execve(ce194220,e9279c5c,0,28204548,282045d8,e381d000,e381d000,e381d015,e381d4dc,e385d000,3fb24,3,20) 
at kern_execve+0x31a
execve(ce194220,e9279cfc,c,ce194220,e9279d2c,...) at execve+0x4c
syscall(e9279d38) at syscall+0x345
Xint0x80_syscall() at Xint0x80_syscall+0x20
--- syscall (59, FreeBSD ELF32, execve), eip = 0x28146a47, esp = 0xbfbfe4cc, 
ebp = 0xbfbfe4e8 ---

db> show lockedvnods
Locked vnodes

0xca2f7770: tag tmpfs, type VREG
    usecount 1, writecount 0, refcount 4 mountedhere 0
    flags ()
    v_object 0xd1c70348 ref 1 pages 19
     lock type tmpfs: EXCL (count 1) by thread 0xce194220 (pid 19396) with 1 
pending
tag VT_TMPFS, tmpfs_node 0xd177f9d4, flags 0x0, links 9
        mode 0555, owner 0, group 0, size 76648, status 0x0

It seems there is some locking problem in tmpfs.

What other info should I provide to help resolve the problem?

Sincerely,
D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck_at_rinet.ru ***
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Received on Thu Aug 02 2007 - 09:58:29 UTC

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