Panic with recent 6.0-BETA1

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Date: Fri, 29 Jul 2005 23:16:50 -0500 (CDT)
To: freebsd-current@freebsd.org

FreeBSD 6.0-BETA1 #0: Mon Jul 25 05:32:21 CDT 2005

The following panic occurred today on a dual Pentium III SMP system (4BSD
scheduler). The core file and debug kernel are available if further
analysis would be productive.

-- 
Greg Rivers
This from the serial console:
biodone: page busy < 0, pindex: 1448908, foff: 0x(1,61bcc000), resid: 4096, index: 0
   iosize: 16384, lblkno: 362227, flags: 0x20000020, npages: 4
   valid: 0xff, dirty: 0x0, wired: 1
panic: biodone: page busy < 0
cpuid = 1
KDB: stack backtrace:
kdb_backtrace(c066a163,1,c065dd3c,d44e3c38,a) at 0xc050439e = kdb_backtrace+0x2e
panic(c065dd3c,ff,0,1,0) at 0xc04e4ed9 = panic+0x139
bufdone(cbf580f0,0,d44e3c9c,c04a5b4d,c2a43108) at 0xc05418d9 = bufdone+0x479
g_vfs_done(c2a43108,0,c19b0c00,c3b8da50,c19c6600) at 0xc04a5dbd = g_vfs_done+0xcd
biodone(c2a43108,c069f288,24c,c064f758,64) at 0xc05410fc = biodone+0xcc
g_io_schedule_up(c19c6600,4c,c19c6600,c04a3550,d44e3d00) at 0xc04a32eb = g_io_schedule_up+0x6b
g_up_procbody(0,d44e3d38,606b4,18d2,0) at 0xc04a3608 = g_up_procbody+0xb8
fork_exit(c04a3550,0,d44e3d38) at 0xc04ca090 = fork_exit+0x80
fork_trampoline() at 0xc0618a9c = fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xd44e3d6c, ebp = 0 ---
Uptime: 4d8h7m14s
Dumping 511 MB (2 chunks)
    chunk 0: 1MB (159 pages)ad0: timeout state=0 unexpected
Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 00
fault virtual address   = 0x1c
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc04f4597
stack pointer           = 0x28:0xd56f9c88
frame pointer           = 0x28:0xd56f9cc8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                          = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 36 (swi4: clock sio)
trap number             = 12
panic: page fault
cpuid = 1
   ... ok
    chunk 1: 511MB (130813 pages) 496 480 464 448 432 416 400 384 368 352 336 320 304 288 272 256 240 224 208 192 176 160 144 128 112 96 80 64 48 32 16 ... ok
Dump complete
Automatic reboot in 15 seconds - press a key on the console to abort
Rebooting...
cpu_reset: Stopping other CPUs
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