Date: Tue, 5 Jan 2010 14:07:48 +0800 From: "Wilkinson, Alex" <alex.wilkinson@dsto.defence.gov.au> To: freebsd-current@freebsd.org Subject: Fatal trap 12: page fault while in kernel mode [SEC=UNCLASSIFIED] Message-ID: <20100105060748.GA16239@stlux503.dsto.defence.gov.au>
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This seems to be happening often to me :(
FreeBSD 9.0-CURRENT #2 r200661: Fri Dec 18
Kernel page fault with the following non-sleepable locks held:
exclusive sleep mutex vm page queue free mutex (vm page queue free mutex) r = 0
(0xc0f65280) locked @ /usr/src/sys/vm/vm_page.c:1052
exclusive sleep mutex vm object (standard object) r = 0 (0xc207bee0) locked @
/usr/src/sys/vm/vm_fault.c:269
KDB: stack backtrace:
db_trace_self_wrapper(c0c94824,e8986954,c08ceab5,c0cba8a5,10d,...) at
db_trace_self_wrapper+0x26
kdb_backtrace(c0cba8a5,10d,ffffffff,c0f2bbfc,e898698c,...) at kdb_backtrace+0x29
_witness_debugger(c0c96cd9,e89869a0,4,1,0,...) at _witness_debugger+0x25
witness_warn(5,0,c0ccb229,c0df122c,c69e6d48,...) at witness_warn+0x1fd
trap(e8986a2c) at trap+0x19e
calltrap() at calltrap+0x6
--- trap 0xc, eip = 0xc0afd732, esp = 0xe8986a6c, ebp = 0xe8986ac0 ---
vm_reserv_alloc_page(c207bee0,58a5,0,37e,c207bee0,...) at
vm_reserv_alloc_page+0x102
vm_page_alloc(c207bee0,58a5,0,40,e8986c0c,...) at vm_page_alloc+0x25e
vm_fault(c684c1d0,2e129000,2,0,2e129000,...) at vm_fault+0x575
trap_pfault(5,0,c0ccb229,2f0,c69e6d48,...) at trap_pfault+0x10d
trap(e8986d38) at trap+0x2d0
calltrap() at calltrap+0x6
--- trap 0xc, eip = 0x2834ecba, esp = 0xbfbfe454, ebp = 0xbfbfe468 ---
Fatal trap 12: page fault while in kernel mode
cpuid = 3; apic id = 03
fault virtual address = 0xc445cf80
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc0afd732
stack pointer = 0x28:0xe8986a6c
frame pointer = 0x28:0xe8986ac0
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 3
current process = 1430 (initial thread)
[thread pid 1430 tid 100141 ]
Stopped at vm_reserv_alloc_page+0x102: cmpl %eax,0x10(%esi)
db> lock order reversal: (Giant after non-sleepable)
1st 0xc0f65280 vm page queue free mutex (vm page queue free mutex) @
/usr/src/sys/vm/vm_page.c:1052
2nd 0xc0debed0 Giant (Giant) @ /usr/src/sys/dev/usb/input/ukbd.c:1594
KDB: stack backtrace:
db_trace_self_wrapper(c0c94824,e89867a4,c08ceab5,c08bf76b,c0c9772d,...) at
db_trace_self_wrapper+0x26
kdb_backtrace(c08bf76b,c0c9772d,c612a6c0,c61291a0,e8986800,...) at
kdb_backtrace+0x29
_witness_debugger(c0c9772d,c0debed0,c0cb35e2,c61291a0,c0c82ff1,...) at
_witness_debugger+0x25
witness_checkorder(c0debed0,9,c0c82ff1,63a,0,...) at witness_checkorder+0x839
_mtx_lock_flags(c0debed0,0,c0c82ff1,63a,c6730c60,...) at _mtx_lock_flags+0xc4
ukbd_poll(c68fc000,1,c6763000,1,e8986880,...) at ukbd_poll+0x48
kbdmux_poll(c6186200,1,c6763084,c0deab48,1,...) at kbdmux_poll+0x46
sc_cngetc(c0d39220,78,e8986898,c084c066,e89868b8,...) at sc_cngetc+0xc3
cncheckc(e89868b8,c04d1bc5,c0c3a16c,c04d2e70,e89868b4,...) at cncheckc+0x3a
cngetc(c0c3a16c,c04d2e70,e89868b4,e89868f0,1,...) at cngetc+0x16
db_readline(c0dba260,78,e89868d4,c04d0806,c0c3a16c,...) at db_readline+0x75
db_read_line(c0c3a16c,e8986928,c04d26bd,c0cc7338,2,...) at db_read_line+0x1a
db_command_loop(c0cc7338,2,0,e898690c,0,...) at db_command_loop+0x46
db_trap(c,0,7,28,e8986a2c,...) at db_trap+0xdd
kdb_trap(c,0,e8986a2c,1,1,...) at kdb_trap+0x96
trap_fatal(5,0,c0ccb229,c0df122c,c69e6d48,...) at trap_fatal+0x2ef
trap(e8986a2c) at trap+0x1ac
calltrap() at calltrap+0x6
--- trap 0xc, eip = 0xc0afd732, esp = 0xe8986a6c, ebp = 0xe8986ac0 ---
vm_reserv_alloc_page(c207bee0,58a5,0,37e,c207bee0,...) at
vm_reserv_alloc_page+0x102
vm_page_alloc(c207bee0,58a5,0,40,e8986c0c,...) at vm_page_alloc+0x25e
vm_fault(c684c1d0,2e129000,2,0,2e129000,...) at vm_fault+0x575
trap_pfault(5,0,c0ccb229,2f0,c69e6d48,...) at trap_pfault+0x10d
trap(e8986d38) at trap+0x2d0
calltrap() at calltrap+0x6
--- trap 0xc, eip = 0x2834ecba, esp = 0xbfbfe454, ebp = 0xbfbfe468 ---
db> bt
Tracing pid 1430 tid 100141 td 0xc69d56c0
vm_reserv_alloc_page(c207bee0,58a5,0,37e,c207bee0,...) at
vm_reserv_alloc_page+0x102
vm_page_alloc(c207bee0,58a5,0,40,e8986c0c,...) at vm_page_alloc+0x25e
vm_fault(c684c1d0,2e129000,2,0,2e129000,...) at vm_fault+0x575
trap_pfault(5,0,c0ccb229,2f0,c69e6d48,...) at trap_pfault+0x10d
trap(e8986d38) at trap+0x2d0
calltrap() at calltrap+0x6
--- trap 0xc, eip = 0x2834ecba, esp = 0xbfbfe454, ebp = 0xbfbfe468 ---
db>
db> show pcpu 0
cpuid = 0
dynamic pcpu = 0xe6d380
curthread = 0xc69f96c0: pid 757 "syslogd"
curpcb = 0xe8970d90
fpcurthread = none
idlethread = 0xc6181480: pid 11 "idle: cpu0"
APIC ID = 0
currentldt = 0x50
spin locks held:
db>
db> show pcpu 1
cpuid = 1
dynamic pcpu = 0x51fa380
curthread = 0xc6e39b40: pid 1679 "VirtualBox"
curpcb = 0xeac7ad90
fpcurthread = none
idlethread = 0xc61816c0: pid 11 "idle: cpu1"
APIC ID = 1
currentldt = 0x50
spin locks held:
db>
db> show pcpu 2
cpuid = 2
dynamic pcpu = 0x51fd380
curthread = 0xc6181900: pid 11 "idle: cpu2"
curpcb = 0xc5fd5d90
fpcurthread = none
idlethread = 0xc6181900: pid 11 "idle: cpu2"
APIC ID = 2
currentldt = 0x50
spin locks held:
db>
db> show pcpu 3
cpuid = 3
dynamic pcpu = 0x5200380
curthread = 0xc69d56c0: pid 1430 "initial thread"
curpcb = 0xe8986d90
fpcurthread = 0xc69d56c0: pid 1430 "initial thread"
idlethread = 0xc6181b40: pid 11 "idle: cpu3"
APIC ID = 3
currentldt = 0x50
spin locks held:
db>
db> show lockedvnods
Locked vnodes
0xc69c1660: tag ufs, type VDIR
usecount 1, writecount 0, refcount 3 mountedhere 0
flags ()
v_object 0xc690e7f8 ref 0 pages 1
lock type ufs: SHARED (count 1)
ino 1719306, on dev ad8s2a
0xc79a6880: tag ufs, type VREG
usecount 2, writecount 1, refcount 3 mountedhere 0
flags ()
v_object 0xc75e9220 ref 0 pages 0
lock type ufs: EXCL by thread 0xc69f96c0 (pid 757)
with shared waiters pending
ino 1719630, on dev ad8s2a
db>
db> show locks
exclusive sleep mutex vm page queue free mutex (vm page queue free mutex) r = 0
(0xc0f65280) locked @ /usr/src/sys/vm/vm_page.c:1052
exclusive sleep mutex vm object (standard object) r = 0 (0xc207bee0) locked @
/usr/src/sys/vm/vm_fault.c:269
shared sx user map (user map) r = 0 (0xc684c218) locked @
/usr/src/sys/vm/vm_map.c:3532
db>
db> panic
panic: from debugger
cpuid = 3
KDB: stack backtrace:
db_trace_self_wrapper(c0c94824,e8986768,c08948dd,c0df1880,0,...) at
db_trace_self_wrapper+0x26
kdb_backtrace(c0df1880,0,c0c91e85,17b,c69d56c0,...) at kdb_backtrace+0x29
mi_switch(100,0,c0c92f4a,98c,3,...) at mi_switch+0x12d
sched_bind(c69d56c0,0,c0c91293,118,e89867cc,...) at sched_bind+0x8a
boot(c0c913d9,c0c913d9,c0c3a0bd,e8986804,3,...) at boot+0x47
panic(c0c3a0bd,e89868c8,c04d06c1,3,0,...) at panic+0x152
db_panic(3,0,ffffffff,e8986840,1,...) at db_panic+0x17
db_command(c0c3a16c,e8986928,c04d26bd,c0cc7338,2,...) at db_command+0x381
db_command_loop(c0cc7338,2,0,e898690c,0,...) at db_command_loop+0x5a
db_trap(c,0,7,28,e8986a2c,...) at db_trap+0xdd
kdb_trap(c,0,e8986a2c,1,1,...) at kdb_trap+0x96
trap_fatal(5,0,c0ccb229,c0df122c,c69e6d48,...) at trap_fatal+0x2ef
trap(e8986a2c) at trap+0x1ac
calltrap() at calltrap+0x6
--- trap 0xc, eip = 0xc0afd732, esp = 0xe8986a6c, ebp = 0xe8986ac0 ---
vm_reserv_alloc_page(c207bee0,58a5,0,37e,c207bee0,...) at
vm_reserv_alloc_page+0x102
vm_page_alloc(c207bee0,58a5,0,40,e8986c0c,...) at vm_page_alloc+0x25e
vm_fault(c684c1d0,2e129000,2,0,2e129000,...) at vm_fault+0x575
trap_pfault(5,0,c0ccb229,2f0,c69e6d48,...) at trap_pfault+0x10d
trap(e8986d38) at trap+0x2d0
calltrap() at calltrap+0x6
--- trap 0xc, eip = 0x2834ecba, esp = 0xbfbfe454, ebp = 0xbfbfe468 ---
db>
-Alex
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