Got this on sunday on my laptop (400 MHz PII running a week-old
-CURRENT):
root@aes /var/crash# gdb -k
GNU gdb 4.18
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GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
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This GDB was configured as "i386-unknown-freebsd".
(kgdb) source ~des/kgdb
(kgdb) kernel 0
IdlePTD 3809280
initial pcb at 30a860
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x3a
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc022e5a4
stack pointer = 0x10:0xc7be6dc8
frame pointer = 0x10:0xc7be6e68
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 = 18 (irq15: ata1)
trap number = 12
panic: page fault
syncing disks... 4 4 1 1
done
Uptime: 22h16m43s
dumping to dev ad0b, offset 262528
dump ata0: resetting devices .. done
127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107
106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52
51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23
22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
---
#0 dumpsys () at ../../kern/kern_shutdown.c:478
478 if (dumping++) {
(kgdb) where
#0 dumpsys () at ../../kern/kern_shutdown.c:478
#1 0xc0195bfc in boot (howto=256) at ../../kern/kern_shutdown.c:321
#2 0xc0195fd1 in panic (fmt=0xc02b4def "page fault")
at ../../kern/kern_shutdown.c:571
#3 0xc026a2ef in trap_fatal (frame=0xc7be6d88, eva=58)
at ../../i386/i386/trap.c:987
#4 0xc026a025 in trap_pfault (frame=0xc7be6d88, usermode=0, eva=58)
at ../../i386/i386/trap.c:901
#5 0xc0269404 in trap (frame={tf_fs = -948174824, tf_es = -1070596080,
tf_ds = 16, tf_edi = -1070531764, tf_esi = -948131488,
tf_ebp = -943821208, tf_isp = -943821388, tf_ebx = 0, tf_edx = 1,
tf_ecx = -943821292, tf_eax = 0, tf_trapno = 12, tf_err = 2,
tf_eip = -1071454812, tf_cs = 8, tf_eflags = 78466, tf_esp = -948131488,
tf_ss = -948131488}) at ../../i386/i386/trap.c:448
#6 0xc022e5a4 in vm_fault (map=0xc030fb4c, vaddr=3332689920,
fault_type=2 '\002', fault_flags=0) at ../../vm/vm_object.h:188
#7 0xc0269fcd in trap_pfault (frame=0xc7be6ed8, usermode=0, eva=3332689920)
at ../../i386/i386/trap.c:888
#8 0xc0269404 in trap (frame={tf_fs = 24, tf_es = -1071054832, tf_ds = 16,
tf_edi = -962277376, tf_esi = -1062592768, tf_ebp = -943821008,
tf_isp = -943821052, tf_ebx = -1057541376, tf_edx = 368, tf_ecx = 512,
tf_eax = -1062618816, tf_trapno = 12, tf_err = 2, tf_eip = -1072504984,
tf_cs = 8, tf_eflags = 78406, tf_esp = -1057541376, tf_ss = -1062575520})
at ../../i386/i386/trap.c:448
#9 0xc012df68 in atapi_read (request=0xc0f73300, length=2352)
at machine/cpufunc.h:227
#10 0xc012d99b in atapi_interrupt (request=0xc0f73300)
at ../../dev/ata/atapi-all.c:408
#11 0xc0122b97 in ata_intr (data=0xc0aa1f00) at ../../dev/ata/ata-all.c:542
#12 0xc01868a0 in ithread_loop (arg=0xc0aa1e80) at ../../kern/kern_intr.c:516
#13 0xc01850f2 in fork_exit (callout=0xc0186478 <ithread_loop>,
arg=0xc0aa1e80, frame=0xc7be6fa8) at ../../kern/kern_fork.c:734
(kgdb) up 6
#6 0xc022e5a4 in vm_fault (map=0xc030fb4c, vaddr=3332689920,
fault_type=2 '\002', fault_flags=0) at ../../vm/vm_object.h:188
188 {
(kgdb) l
183 atomic_clear_short(&object->flags, bits);
184 }
185
186 static __inline void
187 vm_object_pip_add(vm_object_t object, short i)
188 {
189 atomic_add_short(&object->paging_in_progress, i);
190 }
191
192 static __inline void
(kgdb)
DES
--
Dag-Erling Smørgrav - [EMAIL PROTECTED]
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