vn_fullpath: 0xc85e24a0 is not locked but should be

As of today's -current with SCHED_4BSD.  I saved "ps" output on ddb,
so I can place it somewhere if somebody wants.

# Why I got so many panics?  :-(


----- console
vn_fullpath: 0xc85e24a0 is not locked but should be
Debugger("Lock violation.
")
Stopped at      Debugger+0x55:  xchgl   %ebx,in_Debugger.0
db> trace
Debugger(c0739a77,c0739010,c85e24a0,c0739ab8,ece05710) at Debugger+0x55
vfs_badlock(c0739ab8,c0739010,c85e24a0,c07a38c0,c85e24a0) at vfs_badlock+0x45
assert_vop_locked(c85e24a0,c0739010,2,246,c93e0200) at assert_vop_locked+0x62
vn_fullpath(c8e12500,c85e24a0,ece05754,ece05758,c0750da7) at vn_fullpath+0x81
procfs_doprocfile(c8e12500,c9c7054c,c8295e00,ece0577c,0) at procfs_doprocfile+0x3a
pfs_readlink(ece05bd0,c0739563,c0739548,a6,c8e12500) at pfs_readlink+0x11b
namei(ece05c28,c07b4bb8,c07b4b40,c07b2d00,607) at namei+0x43a
stat(c8e12500,ece05d14,c0752fc5,3ee,2) at stat+0x52
syscall(2f,2f,2f,bfbfe270,bfbfe350) at syscall+0x2c0
Xint0x80_syscall() at Xint0x80_syscall+0x1d
--- syscall (188, FreeBSD ELF32, stat), eip = 0x280cb47f, esp = 0xbfbfe24c, ebp = 0xbfbfe7c8 ---
db> show locks
exclusive sleep mutex Giant r = 0 (0xc07ae560) locked _at_ i386/i386/trap.c:1000
db> show lockedvnods
Locked vnodes
0xc9d1e5c8: tag pseudofs, type VLNK, usecount 1, writecount 0, refcount 0, lock type pseudofs: EXCL (count 1) by thread 0xc8e12500 (pid:19220)

db> panic
panic: from debugger
cpuid = 1; 
boot() called on cpu#1
    ACPI-0265: *** Error: Hardware never changed modes

syncing disks, buffers remaining... VOP_LOCK: 0xc85e2250 is not locked but should be
VOP_FSYNC: 0xc85e2250 is not locked but should be
ffs_update: 0xc85e2250 is not locked but should be
VOP_FSYNC: 0xc85e2250 is not locked but should be
VOP_UNLOCK: 0xc85e2250 is not locked but should be
VOP_LOCK: 0xc85e2128 is not locked but should be
VOP_FSYNC: 0xc85e2128 is not locked but should be
ffs_update: 0xc85e2128 is not locked but should be
VOP_FSYNC: 0xc85e2128 is not locked but should be
VOP_UNLOCK: 0xc85e2128 is not locked but should be
VOP_LOCK: 0xc85e2000 is not locked but should be
VOP_FSYNC: 0xc85e2000 is not locked but should be
ffs_update: 0xc85e2000 is not locked but should be
VOP_FSYNC: 0xc85e2000 is not locked but should be
VOP_UNLOCK: 0xc85e2000 is not locked but should be
VOP_LOCK: 0xc85e36f0 is not locked but should be
VOP_FSYNC: 0xc85e36f0 is not locked but should be
ffs_update: 0xc85e36f0 is not locked but should be
VOP_FSYNC: 0xc85e36f0 is not locked but should be
VOP_UNLOCK: 0xc85e36f0 is not locked but should be
VOP_LOCK: 0xc8648378 is not locked but should be
VOP_FSYNC: 0xc8648378 is not locked but should be
ffs_update: 0xc8648378 is not locked but should be
VOP_FSYNC: 0xc8648378 is not locked but should be
VOP_UNLOCK: 0xc8648378 is not locked but should be
VOP_LOCK: 0xc8713000 is not locked but should be
VOP_FSYNC: 0xc8713000 is not locked but should be
ffs_update: 0xc8713000 is not locked but should be
VOP_FSYNC: 0xc8713000 is not locked but should be
VOP_UNLOCK: 0xc8713000 is not locked but should be
VOP_LOCK: 0xc8737250 is not locked but should be
VOP_FSYNC: 0xc8737250 is not locked but should be
ffs_update: 0xc8737250 is not locked but should be
VOP_FSYNC: 0xc8737250 is not locked but should be
VOP_UNLOCK: 0xc8737250 is not locked but should be
VOP_LOCK: 0xc8765378 is not locked but should be
VOP_FSYNC: 0xc8765378 is not locked but should be
ffs_update: 0xc8765378 is not locked but should be
VOP_FSYNC: 0xc8765378 is not locked but should be
VOP_UNLOCK: 0xc8765378 is not locked but should be
VOP_LOCK: 0xc8765250 is not locked but should be
VOP_FSYNC: 0xc8765250 is not locked but should be
ffs_update: 0xc8765250 is not locked but should be
VOP_FSYNC: 0xc8765250 is not locked but should be
VOP_UNLOCK: 0xc8765250 is not locked but should be
VOP_LOCK: 0xc87ba250 is not locked but should be
VOP_FSYNC: 0xc87ba250 is not locked but should be
ffs_update: 0xc87ba250 is not locked but should be
VOP_FSYNC: 0xc87ba250 is not locked but should be
VOP_UNLOCK: 0xc87ba250 is not locked but should be
panic: pmap_invalidate_range: interrupts disabled
cpuid = 1; 
boot() called on cpu#1
    ACPI-0265: *** Error: Hardware never changed modes
Uptime: 46m47s
Dumping 2047 MB
...
-----


-- 
Jun Kuriyama <kuriyama_at_imgsrc.co.jp> // IMG SRC, Inc.
             <kuriyama_at_FreeBSD.org> // FreeBSD Project