6.0-STABLE Panic

[Dikshie]

Dear All,
my 6.0-STABLE always panic when "make buildworld"  

heres the dump:

lapi# kgdb  kernel.debug vmcore.0
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
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This GDB was configured as "i386-marcel-freebsd".

Unread portion of the kernel message buffer:
panic: trying to sleep while sleeping is prohibited
KDB: stack backtrace:
kdb_backtrace(100,c32f4480,c06f8c28,c32f4480,c06f3970) at 0xc0510929 = kdb_backtrace+0x29
panic(c06988c7,c32f4480,0,c06f3970,d5629a7c) at 0xc04f9318 = panic+0xa8
sleepq_add(c06f3970,c06f4a2c,c06917eb,1,c06f4a2c,0,c0691b7d,7d) at 0xc0515e68 = sleepq_add+0x8c
cv_wait(c06f3970,c06f4a2c,0,16,d5629cb4) at 0xc04d3b5e = cv_wait+0x132
_sx_xlock(c06f3940,c06918e2,180) at 0xc04fe334 = _sx_xlock+0x5c
acctwatch(0) at 0xc04d1cf8 = acctwatch+0x20
softclock(0) at 0xc05043d9 = softclock+0x211
ithread_loop(c32ab500,d5629d38,c32ab500,c04e5d74,0) at 0xc04e5eb8 = ithread_loop+0x144
fork_exit(c04e5d74,c32ab500,d5629d38) at 0xc04e5328 = fork_exit+0xa0
fork_trampoline() at 0xc065169c = fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xd5629d6c, ebp = 0 ---
Uptime: 41m7s
Dumping 510 MB (2 chunks)
  chunk 0: 1MB (159 pages) ... ok
  chunk 1: 511MB (130608 pages) 495 479 463 447 431 415 399 383 367 351 335 319 303 287 271 255 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15

#0  doadump () at pcpu.h:165
165     pcpu.h: No such file or directory.
        in pcpu.h
(kgdb) bt
#0  doadump () at pcpu.h:165
#1  0xc04f90d0 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:399
#2  0xc04f937b in panic (fmt=0xc06988c7 "trying to sleep while sleeping is prohibited")
    at /usr/src/sys/kern/kern_shutdown.c:555
#3  0xc0515e68 in sleepq_add (wchan=0xc06f3970, lock=0xc06f4a2c, wmesg=0x0, flags=1)
    at /usr/src/sys/kern/subr_sleepqueue.c:273
#4  0xc04d3b5e in cv_wait (cvp=0xc06f3970, mp=0xc06f4a2c) at /usr/src/sys/kern/kern_condvar.c:127
#5  0xc04fe334 in _sx_xlock (sx=0xc06f3940, file=0xc06918e2 "/usr/src/sys/kern/kern_acct.c", line=384)
    at /usr/src/sys/kern/kern_sx.c:188
#6  0xc04d1cf8 in acctwatch (a=0x0) at /usr/src/sys/kern/kern_acct.c:384
#7  0xc05043d9 in softclock (dummy=0x0) at /usr/src/sys/kern/kern_timeout.c:290
#8  0xc04e5eb8 in ithread_loop (arg=0xc32ab500) at /usr/src/sys/kern/kern_intr.c:547
#9  0xc04e5328 in fork_exit (callout=0xc04e5d74 <ithread_loop>, arg=0xc32ab500, frame=0xd5629d38)
    at /usr/src/sys/kern/kern_fork.c:789
#10 0xc065169c in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:208
(kgdb)



it is:
lapi# uname -a
FreeBSD lapi.itb.ac.id 6.0-STABLE FreeBSD 6.0-STABLE #0: Tue Jan  3 10:22:22 WIT 2006     dikshie at lapi.itb.ac.id:/usr/obj/usr/src/sys/LAPI  i386









regards, 

-dikshie-