Hello all, I keep getting a kernel panic every Saturday night, so I figured I would go through the core dump.

# uname -a
FreeBSD xx.fsklaw.com 7.0-RELEASE FreeBSD 7.0-RELEASE #1: Wed Apr 23 08:01:10 PDT 2008 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/TEST amd64

# kgdb kernel.symbols /var/crash/vmcore.2
[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 "amd64-marcel-freebsd".

Unread portion of the kernel message buffer:

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address    = 0x250
fault code        = supervisor read data, page not present
instruction pointer    = 0x8:0xffffffff80482a5d
stack pointer            = 0x10:0xffffffffb184b570
frame pointer            = 0x10:0xffffff003f9cf6a0
code segment        = base 0x0, limit 0xfffff, type 0x1b
          = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags    = interrupt enabled, resume, IOPL = 0
current process        = 37920 (bsdtar)
trap number        = 12
panic: page fault
cpuid = 1
Uptime: 7d2h23m33s
Physical memory: 2034 MB
Dumping 415 MB: 400 384 368 352 336 320 304 288 272 256 240 224 208 192 176 160 144 128 112 96 80 64 48 32 16

#0  doadump () at pcpu.h:194
194        __asm __volatile("movq %%gs:0,%0" : "=r" (td));
(kgdb) where
#0  doadump () at pcpu.h:194
#1  0x0000000000000004 in ?? ()
#2 0xffffffff8048e0d9 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409 #3 0xffffffff8048e4dd in panic (fmt=0x104 <Address 0x104 out of bounds>) at /usr/src/sys/kern/kern_shutdown.c:563 #4 0xffffffff80786f44 in trap_fatal (frame=0xffffff003f9cf6a0, eva=18446742975518566608) at /usr/src/sys/amd64/amd64/trap.c:724 #5 0xffffffff80787315 in trap_pfault (frame=0xffffffffb184b4c0, usermode=0) at /usr/src/sys/amd64/amd64/trap.c:641 #6 0xffffffff80787c58 in trap (frame=0xffffffffb184b4c0) at /usr/src/sys/amd64/amd64/trap.c:410 #7 0xffffffff8076d88e in calltrap () at /usr/src/sys/amd64/amd64/exception.S:169 #8 0xffffffff80482a5d in _mtx_lock_sleep (m=0xffffff009662c410, tid=18446742975265175200, opts=Variable "opts" is not available.
) at /usr/src/sys/kern/kern_mutex.c:335
#9 0xffffffff804f5978 in vfs_vmio_release (bp=0xffffffff9a329220) at /usr/src/sys/kern/vfs_bio.c:1530 #10 0xffffffff804f77f4 in getnewbuf (slpflag=0, slptimeo=0, size=Variable "size" is not available.
) at /usr/src/sys/kern/vfs_bio.c:1847
#11 0xffffffff804f8801 in getblk (vp=0xffffff000b71c5d0, blkno=294994, size=16384, slpflag=0, slptimeo=0, flags=Variable "flags" is not available.
) at /usr/src/sys/kern/vfs_bio.c:2602
#12 0xffffffff806a3d5b in ffs_balloc_ufs2 (vp=0xffffff000b71c5d0, startoffset=Variable "startoffset" is not available.
) at /usr/src/sys/ufs/ffs/ffs_balloc.c:844
#13 0xffffffff806bf6e5 in ffs_write (ap=0xffffffffb184ba10) at /usr/src/sys/ufs/ffs/ffs_vnops.c:720 #14 0xffffffff807e04e5 in VOP_WRITE_APV (vop=0xffffffff80a6b0e0, a=0xffffffffb184ba10) at vnode_if.c:691 #15 0xffffffff8051ae41 in vn_write (fp=0xffffff00284771e0, uio=0xffffffffb184bb00, active_cred=Variable "active_cred" is not available.
) at vnode_if.h:373
#16 0xffffffff804c6468 in dofilewrite (td=0xffffff003f9cf6a0, fd=3, fp=0xffffff00284771e0, auio=0xffffffffb184bb00, offset=Variable "offset" is not available.
) at file.h:254
#17 0xffffffff804c676e in kern_writev (td=0xffffff003f9cf6a0, fd=3, auio=0xffffffffb184bb00) at /usr/src/sys/kern/sys_generic.c:401 #18 0xffffffff804c67ec in write (td=0xffffff009662c410, uap=0xffffff003f9cf6a0) at /usr/src/sys/kern/sys_generic.c:317 #19 0xffffffff80787597 in syscall (frame=0xffffffffb184bc70) at /usr/src/sys/amd64/amd64/trap.c:852 #20 0xffffffff8076da9b in Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:290
#21 0x0000000800a66d3c in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb) up 8
#8 0xffffffff80482a5d in _mtx_lock_sleep (m=0xffffff009662c410, tid=18446742975265175200, opts=Variable "opts" is not available.
) at /usr/src/sys/kern/kern_mutex.c:335
335                owner = (struct thread *)(v & ~MTX_FLAGMASK);
(kgdb) p owner
$1 = (volatile struct thread *) 0xfffffffffffffff8
(kgdb) p v
$2 = 18446744073709551615

Note the uptime, this happens every Saturday for the last three weeks. I have a cronjob that tar/bzips a drive and scps it to another box, but that runs nightly at midnight on the cronjob, and this happens weekly but only on Saturday, same cronjob same data. I figured if it happened again, I would hit up the mailing list. Hopefully you all can suggest what to upgrade to or how to further troubleshoot this issue. Thanks a bundle y'all, love the beastie!
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