Date: Mon, 29 Sep 2003 21:26:28 -0400 From: "Michael W. Oliver" <michael@gargantuan.com> To: freebsd-stable@freebsd.org Subject: panics on 24 hour boundaries Message-ID: <200309292126.36578.michael@gargantuan.com>
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Hi stable, nice you see you again. I was one of those guys who was seeing=
=20
constand panics on 24 hour boundaries but couldn't provide a backtrace due=
=20
to the ar device not taking a dump. I installed a dedicated drive just to=
=20
take the dump, and then didn't have a panic for a couple weeks. Now, I am=
=20
back with, and I have traces to share.
The first two, from 2003-09-27 and 2003-09-28 are from an older kernel...=20
the same one that was working great for a couple weeks. Due to some severe=
=20
storms around here, I shut the maching down voluntarily, and once rebooted,=
=20
it started the 24 hour panic crap again.
So, since I didn't have anything much to lose, I cvsuped my src and rebuilt=
=20
and installed world and kernel on the evening of 2003-09-28. Lo and=20
behold, I had another 24 hour panic. The trace for this one is=20
phoenix_2003-09-29.txt. The full uname from this latest panic is:
=46reeBSD phoenix.gargantuan.com 4.9-PRERELEASE FreeBSD 4.9-PRERELEASE #1: =
Sun=20
Sep 28 18:16:30 EDT 2003 =20
root@phoenix.gargantuan.com:/usr/obj/usr/src/sys/PHOENIX i386
If this information isn't sufficient, please let me know what else I can do=
=20
to help troubleshoot this problem. Thanks in advance for your help, it is=
=20
much appreciated!
=2D-=20
Mike
perl -e 'print unpack("u","88V]N=3D&%C=3D\"!I;F9O(&EN(&AE861E<G,*");'
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$ gdb -k kernel.debug vmcore.0
GNU gdb 4.18 (FreeBSD)
Copyright 1998 Free Software Foundation, Inc.
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 condition=
s.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-unknown-freebsd"...Deprecated bfd_read cal=
led at /usr/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxrea=
d.c line 2627 in elfstab_build_psymtabs
Deprecated bfd_read called at /usr/src/gnu/usr.bin/binutils/gdb/../../../..=
/contrib/gdb/gdb/dbxread.c line 933 in fill_symbuf
IdlePTD at phsyical address 0x0040f000
initial pcb at physical address 0x003618e0
panicstr: page fault
panic messages:
=2D--
=46atal trap 12: page fault while in kernel mode
fault virtual address =3D 0x121a2673
fault code =3D supervisor read, page not present
instruction pointer =3D 0x8:0xc0283ad3
stack pointer =3D 0x10:0xdf65dc3c
frame pointer =3D 0x10:0xdf65dc50
code segment =3D base 0x0, limit 0xfffff, type 0x1b
=3D DPL 0, pres 1, def32 1, gran 1
processor eflags =3D interrupt enabled, resume, IOPL =3D 0
current process =3D 115 (ntpd)
interrupt mask =3D none
trap number =3D 12
panic: page fault
syncing disks... 1=20
done
Uptime: 1d0h0m17s
dumping to dev #ad/0x20001, offset 3237369
dump ata0: resetting devices .. done
639 638 637 636 635 634 633 632 631 630 629 628 627 626 625 624 623 622 621=
620 619 618 617 616 615 614 613 612 611 610 609 608 607 606 605 604 603 60=
2 601 600 599 598 597 596 595 594 593 592 591 590 589 588 587 586 585 584 5=
83 582 581 580 579 578 577 576 575 574 573 572 571 570 569 568 567 566 565 =
564 563 562 561 560 559 558 557 556 555 554 553 552 551 550 549 548 547 546=
545 544 543 542 541 540 539 538 537 536 535 534 533 532 531 530 529 528 52=
7 526 525 524 523 522 521 520 519 518 517 516 515 514 513 512 511 510 509 5=
08 507 506 505 504 503 502 501 500 499 498 497 496 495 494 493 492 491 490 =
489 488 487 486 485 484 483 482 481 480 479 478 477 476 475 474 473 472 471=
470 469 468 467 466 465 464 463 462 461 460 459 458 457 456 455 454 453 45=
2 451 450 449 448 447 446 445 444 443 442 441 440 439 438 437 436 435 434 4=
33 432 431 430 429 428 427 426 425 424 423 422 421 420 419 418 417 416 415 =
414 413 412 411 410 409 408 407 406 405 404 403 402 401 400 399 398 397 396=
395 394 393 392 391 390 389 388 387 386 385 384 383 382 381 380 379 378 37=
7 376 375 374 373 372 371 370 369 368 367 366 365 364 363 362 361 360 359 3=
58 357 356 355 354 353 352 351 350 349 348 347 346 345 344 343 342 341 340 =
339 338 337 336 335 334 333 332 331 330 329 328 327 326 325 324 323 322 321=
320 319 318 317 316 315 314 313 312 311 310 309 308 307 306 305 304 303 30=
2 301 300 299 298 297 296 295 294 293 292 291 290 289 288 287 286 285 284 2=
83 282 281 280 279 278 277 276 275 274 273 272 271 270 269 268 267 266 265 =
264 263 262 261 260 259 258 257 256 255 254 253 252 251 250 249 248 247 246=
245 244 243 242 241 240 239 238 237 236 235 234 233 232 231 230 229 228 22=
7 226 225 224 223 222 221 220 219 218 217 216 215 214 213 212 211 210 209 2=
08 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190 =
189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171=
170 169 168 167 166 165 164 163 162 161 160 159 158 157 156 155 154 153 15=
2 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 1=
33 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 =
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
=2D--
#0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:487
487 if (dumping++) {
(kgdb) bt
#0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:487
#1 0xc01a1c4f in boot (howto=3D256) at /usr/src/sys/kern/kern_shutdown.c:3=
16
#2 0xc01a2074 in poweroff_wait (junk=3D0xc031a58c, howto=3D-1070489457) at=
/usr/src/sys/kern/kern_shutdown.c:595
#3 0xc02c1006 in trap_fatal (frame=3D0xdf65dbfc, eva=3D303703667) at /usr/=
src/sys/i386/i386/trap.c:974
#4 0xc02c0cd9 in trap_pfault (frame=3D0xdf65dbfc, usermode=3D0, eva=3D3037=
03667) at /usr/src/sys/i386/i386/trap.c:867
#5 0xc02c0897 in trap (frame=3D{tf_fs =3D 16, tf_es =3D 16, tf_ds =3D 16, =
tf_edi =3D 512, tf_esi =3D -1030041600, tf_ebp =3D -546972592,=20
tf_isp =3D -546972632, tf_ebx =3D 11, tf_edx =3D -1029989860, tf_ecx =
=3D 303703647, tf_eax =3D 1, tf_trapno =3D 12, tf_err =3D 0,=20
tf_eip =3D -1071105325, tf_cs =3D 8, tf_eflags =3D 66070, tf_esp =3D =
0, tf_ss =3D -1030041600}) at /usr/src/sys/i386/i386/trap.c:466
#6 0xc0283ad3 in ufsdirhash_findfree (ip=3D0xc29ad000, slotneeded=3D24, sl=
otsize=3D0xdf65dcc4) at /usr/src/sys/ufs/ufs/ufs_dirhash.c:467
#7 0xc027df16 in ufs_lookup (ap=3D0xdf65dd18) at /usr/src/sys/ufs/ufs/ufs_=
lookup.c:200
#8 0xc0283105 in ufs_vnoperate (ap=3D0xdf65dd18) at /usr/src/sys/ufs/ufs/u=
fs_vnops.c:2376
#9 0xc01cc14e in vfs_cache_lookup (ap=3D0xdf65dd70) at vnode_if.h:77
#10 0xc0283105 in ufs_vnoperate (ap=3D0xdf65dd70) at /usr/src/sys/ufs/ufs/u=
fs_vnops.c:2376
#11 0xc01cf08d in lookup (ndp=3D0xdf65dec8) at vnode_if.h:52
#12 0xc01ceb80 in namei (ndp=3D0xdf65dec8) at /usr/src/sys/kern/vfs_lookup.=
c:153
#13 0xc01d73be in vn_open (ndp=3D0xdf65dec8, fmode=3D1538, cmode=3D420) at =
/usr/src/sys/kern/vfs_vnops.c:99
#14 0xc01d3688 in open (p=3D0xd865dc20, uap=3D0xdf65df80) at /usr/src/sys/k=
ern/vfs_syscalls.c:1029
#15 0xc02c12b5 in syscall2 (frame=3D{tf_fs =3D 47, tf_es =3D 47, tf_ds =3D =
47, tf_edi =3D 8, tf_esi =3D 672455168, tf_ebp =3D -1077937200,=20
tf_isp =3D -546971692, tf_ebx =3D 672379980, tf_edx =3D 672455168, tf=
_ecx =3D 16, tf_eax =3D 5, tf_trapno =3D 22, tf_err =3D 2,=20
tf_eip =3D 672287832, tf_cs =3D 31, tf_eflags =3D 663, tf_esp =3D -10=
77937244, tf_ss =3D 47}) at /usr/src/sys/i386/i386/trap.c:1175
#16 0xc02b2705 in Xint0x80_syscall ()
#17 0x805ead8 in ?? ()
#18 0x805e83c in ?? ()
#19 0x805f7ab in ?? ()
#20 0x805f370 in ?? ()
#21 0x8049b0e in ?? ()
(kgdb)
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root phoenix Mon Sep 29 21:03:26 /usr/var/crash
$ gdb -k kernel.debug vmcore.0=20
GNU gdb 4.18 (FreeBSD)
Copyright 1998 Free Software Foundation, Inc.
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 condition=
s.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-unknown-freebsd"...Deprecated bfd_read cal=
led at /usr/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxrea=
d.c line 2627 in elfstab_build_psymtabs
Deprecated bfd_read called at /usr/src/gnu/usr.bin/binutils/gdb/../../../..=
/contrib/gdb/gdb/dbxread.c line 933 in fill_symbuf
IdlePTD at phsyical address 0x00408000
initial pcb at physical address 0x0035c060
panicstr: page fault
panic messages:
=2D--
=46atal trap 12: page fault while in kernel mode
fault virtual address =3D 0xa4cf520b
fault code =3D supervisor read, page not present
instruction pointer =3D 0x8:0xc01f360c
stack pointer =3D 0x10:0xc031ef00
frame pointer =3D 0x10:0xc031ef08
code segment =3D base 0x0, limit 0xfffff, type 0x1b
=3D DPL 0, pres 1, def32 1, gran 1
processor eflags =3D interrupt enabled, resume, IOPL =3D 0
current process =3D Idle
interrupt mask =3D=20
trap number =3D 12
panic: page fault
syncing disks...=20
=46atal trap 12: page fault while in kernel mode
fault virtual address =3D 0x30
fault code =3D supervisor read, page not present
instruction pointer =3D 0x8:0xc026ff98
stack pointer =3D 0x10:0xc031ed24
frame pointer =3D 0x10:0xc031ed2c
code segment =3D base 0x0, limit 0xfffff, type 0x1b
=3D DPL 0, pres 1, def32 1, gran 1
processor eflags =3D interrupt enabled, resume, IOPL =3D 0
current process =3D Idle
interrupt mask =3D bio=20
trap number =3D 12
panic: page fault
Uptime: 1d0h0m17s
dumping to dev #ad/0x20001, offset 3237369
dump ata0: resetting devices .. done
639 638 637 636 635 634 633 632 631 630 629 628 627 626 625 624 623 622 621=
620 619 618 617 616 615 614 613 612 611 610 609 608 607 606 605 604 603 60=
2 601 600 599 598 597 596 595 594 593 592 591 590 589 588 587 586 585 584 5=
83 582 581 580 579 578 577 576 575 574 573 572 571 570 569 568 567 566 565 =
564 563 562 561 560 559 558 557 556 555 554 553 552 551 550 549 548 547 546=
545 544 543 542 541 540 539 538 537 536 535 534 533 532 531 530 529 528 52=
7 526 525 524 523 522 521 520 519 518 517 516 515 514 513 512 511 510 509 5=
08 507 506 505 504 503 502 501 500 499 498 497 496 495 494 493 492 491 490 =
489 488 487 486 485 484 483 482 481 480 479 478 477 476 475 474 473 472 471=
470 469 468 467 466 465 464 463 462 461 460 459 458 457 456 455 454 453 45=
2 451 450 449 448 447 446 445 444 443 442 441 440 439 438 437 436 435 434 4=
33 432 431 430 429 428 427 426 425 424 423 422 421 420 419 418 417 416 415 =
414 413 412 411 410 409 408 407 406 405 404 403 402 401 400 399 398 397 396=
395 394 393 392 391 390 389 388 387 386 385 384 383 382 381 380 379 378 37=
7 376 375 374 373 372 371 370 369 368 367 366 365 364 363 362 361 360 359 3=
58 357 356 355 354 353 352 351 350 349 348 347 346 345 344 343 342 341 340 =
339 338 337 336 335 334 333 332 331 330 329 328 327 326 325 324 323 322 321=
320 319 318 317 316 315 314 313 312 311 310 309 308 307 306 305 304 303 30=
2 301 300 299 298 297 296 295 294 293 292 291 290 289 288 287 286 285 284 2=
83 282 281 280 279 278 277 276 275 274 273 272 271 270 269 268 267 266 265 =
264 263 262 261 260 259 258 257 256 255 254 253 252 251 250 249 248 247 246=
245 244 243 242 241 240 239 238 237 236 235 234 233 232 231 230 229 228 22=
7 226 225 224 223 222 221 220 219 218 217 216 215 214 213 212 211 210 209 2=
08 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190 =
189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171=
170 169 168 167 166 165 164 163 162 161 160 159 158 157 156 155 154 153 15=
2 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 1=
33 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 =
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=20
=2D--
#0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:487
487 if (dumping++) {
(kgdb) bt
#0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:487
#1 0xc01a19bf in boot (howto=3D260) at /usr/src/sys/kern/kern_shutdown.c:3=
16
#2 0xc01a1de4 in poweroff_wait (junk=3D0xc03153ec, howto=3D-1070510353) at=
/usr/src/sys/kern/kern_shutdown.c:595
#3 0xc02bcb8a in trap_fatal (frame=3D0xc031ece4, eva=3D48) at /usr/src/sys=
/i386/i386/trap.c:974
#4 0xc02bc85d in trap_pfault (frame=3D0xc031ece4, usermode=3D0, eva=3D48) =
at /usr/src/sys/i386/i386/trap.c:867
#5 0xc02bc41b in trap (frame=3D{tf_fs =3D 16, tf_es =3D 16, tf_ds =3D 16, =
tf_edi =3D -1070101248, tf_esi =3D 0, tf_ebp =3D -1070469844,=20
tf_isp =3D -1070469872, tf_ebx =3D -1070360356, tf_edx =3D 6869056, t=
f_ecx =3D 28, tf_eax =3D 0, tf_trapno =3D 12, tf_err =3D 0,=20
tf_eip =3D -1071186024, tf_cs =3D 8, tf_eflags =3D 66050, tf_esp =3D =
0, tf_ss =3D 0}) at /usr/src/sys/i386/i386/trap.c:466
#6 0xc026ff98 in acquire_lock (lk=3D0xc03398dc) at /usr/src/sys/ufs/ffs/ff=
s_softdep.c:266
#7 0xc02745d6 in softdep_fsync_mountdev (vp=3D0xda9e7a80) at /usr/src/sys/=
ufs/ffs/ffs_softdep.c:4024
#8 0xc0278816 in ffs_fsync (ap=3D0xc031eda0) at /usr/src/sys/ufs/ffs/ffs_v=
nops.c:134
#9 0xc027749f in ffs_sync (mp=3D0xc29b4200, waitfor=3D2, cred=3D0xc1818680=
, p=3D0xc0378d00) at vnode_if.h:558
#10 0xc01d2d17 in sync (p=3D0xc0378d00, uap=3D0x0) at /usr/src/sys/kern/vfs=
_syscalls.c:577
#11 0xc01a1782 in boot (howto=3D256) at /usr/src/sys/kern/kern_shutdown.c:2=
35
#12 0xc01a1de4 in poweroff_wait (junk=3D0xc03153ec, howto=3D-1070510353) at=
/usr/src/sys/kern/kern_shutdown.c:595
#13 0xc02bcb8a in trap_fatal (frame=3D0xc031eec0, eva=3D2765050379) at /usr=
/src/sys/i386/i386/trap.c:974
#14 0xc02bc85d in trap_pfault (frame=3D0xc031eec0, usermode=3D0, eva=3D2765=
050379) at /usr/src/sys/i386/i386/trap.c:867
#15 0xc02bc41b in trap (frame=3D{tf_fs =3D 16, tf_es =3D 16, tf_ds =3D 16, =
tf_edi =3D 4194304, tf_esi =3D 4194304, tf_ebp =3D -1070469368,=20
tf_isp =3D -1070469396, tf_ebx =3D -1529916925, tf_edx =3D -152991692=
5, tf_ecx =3D -821203904, tf_eax =3D 1064884209, tf_trapno =3D 12,=20
tf_err =3D 0, tf_eip =3D -1071696372, tf_cs =3D 8, tf_eflags =3D 6618=
2, tf_esp =3D 0, tf_ss =3D -1071696420})
at /usr/src/sys/i386/i386/trap.c:466
#16 0xc01f360c in arptimer (ignored_arg=3D0x0) at /usr/src/sys/netinet/if_e=
ther.c:150
#17 0xc01a7a4d in softclock () at /usr/src/sys/kern/kern_timeout.c:131
#18 0xc02af6b3 in doreti_swi ()
(kgdb)=20
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root phoenix Sun Sep 28 13:11:43 /usr/var/crash
$ gdb -k kernel.debug vmcore.1
GNU gdb 4.18 (FreeBSD)
Copyright 1998 Free Software Foundation, Inc.
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 condition=
s.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-unknown-freebsd"...Deprecated bfd_read cal=
led at /usr/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxrea=
d.c line 2627 in elfstab_build_psymtabs
Deprecated bfd_read called at /usr/src/gnu/usr.bin/binutils/gdb/../../../..=
/contrib/gdb/gdb/dbxread.c line 933 in fill_symbuf
IdlePTD at phsyical address 0x0040f000
initial pcb at physical address 0x003618e0
panicstr: clist reservation botch
panic messages:
=2D--
panic: clist reservation botch
syncing disks... 3=20
done
Uptime: 1d5h7m46s
dumping to dev #ad/0x20001, offset 3237369
dump ata0: resetting devices .. done
639 638 637 636 635 634 633 632 631 630 629 628 627 626 625 624 623 622 621=
620 619 618 617 616 615 614 613 612 611 610 609 608 607 606 605 604 603 60=
2 601 600 599 598 597 596 595 594 593 592 591 590 589 588 587 586 585 584 5=
83 582 581 580 579 578 577 576 575 574 573 572 571 570 569 568 567 566 565 =
564 563 562 561 560 559 558 557 556 555 554 553 552 551 550 549 548 547 546=
545 544 543 542 541 540 539 538 537 536 535 534 533 532 531 530 529 528 52=
7 526 525 524 523 522 521 520 519 518 517 516 515 514 513 512 511 510 509 5=
08 507 506 505 504 503 502 501 500 499 498 497 496 495 494 493 492 491 490 =
489 488 487 486 485 484 483 482 481 480 479 478 477 476 475 474 473 472 471=
470 469 468 467 466 465 464 463 462 461 460 459 458 457 456 455 454 453 45=
2 451 450 449 448 447 446 445 444 443 442 441 440 439 438 437 436 435 434 4=
33 432 431 430 429 428 427 426 425 424 423 422 421 420 419 418 417 416 415 =
414 413 412 411 410 409 408 407 406 405 404 403 402 401 400 399 398 397 396=
395 394 393 392 391 390 389 388 387 386 385 384 383 382 381 380 379 378 37=
7 376 375 374 373 372 371 370 369 368 367 366 365 364 363 362 361 360 359 3=
58 357 356 355 354 353 352 351 350 349 348 347 346 345 344 343 342 341 340 =
339 338 337 336 335 334 333 332 331 330 329 328 327 326 325 324 323 322 321=
320 319 318 317 316 315 314 313 312 311 310 309 308 307 306 305 304 303 30=
2 301 300 299 298 297 296 295 294 293 292 291 290 289 288 287 286 285 284 2=
83 282 281 280 279 278 277 276 275 274 273 272 271 270 269 268 267 266 265 =
264 263 262 261 260 259 258 257 256 255 254 253 252 251 250 249 248 247 246=
245 244 243 242 241 240 239 238 237 236 235 234 233 232 231 230 229 228 22=
7 226 225 224 223 222 221 220 219 218 217 216 215 214 213 212 211 210 209 2=
08 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190 =
189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171=
170 169 168 167 166 165 164 163 162 161 160 159 158 157 156 155 154 153 15=
2 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 1=
33 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 =
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
=2D--
#0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:487
487 if (dumping++) {
(kgdb) where
#0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:487
#1 0xc01a1c4f in boot (howto=3D256) at /usr/src/sys/kern/kern_shutdown.c:3=
16
#2 0xc01a2074 in poweroff_wait (junk=3D0xc02fc304, howto=3D-1070385024) at=
/usr/src/sys/kern/kern_shutdown.c:595
#3 0xc01bc8c5 in cblock_free_cblocks (number=3D31215) at /usr/src/sys/kern=
/tty_subr.c:103
#4 0xc01bc88e in clist_alloc_cblocks (clistp=3D0xc29ad100, ccmax=3D1024, c=
creserved=3D1024) at /usr/src/sys/kern/tty_subr.c:178
#5 0xc01ba448 in ttsetwater (tp=3D0xc29ad100) at /usr/src/sys/kern/tty.c:2=
264
#6 0xc01b7a3f in ttyopen (device=3D0xc035fe24, tp=3D0xc29ad100) at /usr/sr=
c/sys/kern/tty.c:221
#7 0xc02d2503 in sioopen (dev=3D0xc035fe24, flag=3D10, mode=3D8192, p=3D0x=
d865df60) at /usr/src/sys/isa/sio.c:1633
#8 0xc01bb5a4 in cnopen (dev=3D0xc035feac, flag=3D10, mode=3D8192, p=3D0xd=
865df60) at /usr/src/sys/kern/tty_cons.c:279
#9 0xc01db81d in spec_open (ap=3D0xdf654dfc) at /usr/src/sys/miscfs/specfs=
/spec_vnops.c:193
#10 0xc01db71d in spec_vnoperate (ap=3D0xdf654dfc) at /usr/src/sys/miscfs/s=
pecfs/spec_vnops.c:119
#11 0xc0283135 in ufs_vnoperatespec (ap=3D0xdf654dfc) at /usr/src/sys/ufs/u=
fs/ufs_vnops.c:2394
#12 0xc01d773b in vn_open (ndp=3D0xdf654ec8, fmode=3D10, cmode=3D0) at vnod=
e_if.h:189
#13 0xc01d3688 in open (p=3D0xd865df60, uap=3D0xdf654f80) at /usr/src/sys/k=
ern/vfs_syscalls.c:1029
#14 0xc02c12b5 in syscall2 (frame=3D{tf_fs =3D 47, tf_es =3D 47, tf_ds =3D =
47, tf_edi =3D -1077940772, tf_esi =3D -1077940774,=20
tf_ebp =3D -1077942188, tf_isp =3D -547008556, tf_ebx =3D -1077943290=
, tf_edx =3D 2, tf_ecx =3D 134561838, tf_eax =3D 5, tf_trapno =3D 7,=20
tf_err =3D 2, tf_eip =3D 672029784, tf_cs =3D 31, tf_eflags =3D 659, =
tf_esp =3D -1077943416, tf_ss =3D 47})
at /usr/src/sys/i386/i386/trap.c:1175
#15 0xc02b2705 in Xint0x80_syscall ()
#16 0x804be71 in ?? ()
#17 0xbfbfffac in ?? ()
#18 0x804972a in ?? ()
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