I have a machine which was stable until I swapped the motherboard with a
Intel D865GBF with a Pentium 4 and 2GB of memory. Previously it was
running on a PentiumIII motherboard.
Since that time It's been crashing on a regular basis. I sent a
(admittedly brief) question into the list a day or so ago. This is a
followup which provides some more information.
The box is running 4.9-STABLE, cvsupped within the last 24 or so hours.
In order to get a crashdump out of this I had to reconfigure the kernel
with MAXMEM set to 768x1024 to fit in one of my 1GB swap partitions. I
finally (today) got a crashdump for the traceback below.
This is crashing fairly consistently at the Instruction pointer below.
Occasionally I'll see a crash in one of the pmap_ functions
(pmap_object_init_pt was a favorite before the cvsup).
I'm willing to do some additional digging, but I'm not a kernel expert,
especially when it comes to virtual memory.
Before we get to the crash dump, a couple more datapoints: This is a
single processor board, although I've had SMP both on and off (to enable
HTT). Doesn't make a difference.
This doesn't seem to be load related, although this box does a lot of
things on a periodic basis.
I can provide additional data/config files on request. I'd appreciate any
ideas on how to restabilize this box.
The crashdump follows:
-----------------------------------------------
corp.mt.net:/var/crash|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
conditions.
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
called at
/usr/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxread.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 physical address 0x003a4000
initial pcb at physical address 0x002fd920
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x36
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc01f5ca6
stack pointer = 0x10:0xe5f7aaec
frame pointer = 0x10:0xe5f7ab8c
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 = 39618 (perl)
interrupt mask = net bio cam
trap number = 12
panic: page fault
syncing disks... 86 8 6 6 6 6 6 6 6 22 1 1 1 1 1 1 1 8
done
Uptime: 23h4m46s
dumping to dev #ad/0x20011, offset 524288
dump ata1: resetting devices .. done
768 767 766 765 764 763 762 761 760 759 758 757 756 755 754 753 752 751
750 749 748 747 746 745 744 743 742 741 740 739 738 737 736 735 734 733
732 731 730 729 728 727 726 725 724 723 722 721 720 719 718 717 716 715
714 713 712 711 710 709 708 707 706 705 704 703 702 701 700 699 698 697
696 695 694 693 692 691 690 689 688 687 686 685 684 683 682 681 680 679
678 677 676 675 674 673 672 671 670 669 668 667 666 665 664 663 662 661
660 659 658 657 656 655 654 653 652 651 650 649 648 647 646 645 644 643
642 641 640 639 638 637 636 635 634 633 632 631 630 629 628 627 626 625
624 623 622 621 620 619 618 617 616 615 614 613 612 611 610 609 608 607
606 605 604 603 602 601 600 599 598 597 596 595 594 593 592 591 590 589
588 587 586 585 584 583 582 581 580 579 578 577 576 575 574 573 572 571
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
534 533 532 531 530 529 528 527 526 525 524 523 522 521 520 519 518 517
516 515 514 513 512 511 510 509 508 507 506 505 504 503 502 501 500 499
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
462 461 460 459 458 457 456 455 454 453 452 451 450 449 448 447 446 445
444 443 442 441 440 439 438 437 436 435 434 433 432 431 430 429 428 427
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
390 389 388 387 386 385 384 383 382 381 380 379 378 377 376 375 374 373
372 371 370 369 368 367 366 365 364 363 362 361 360 359 358 357 356 355
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
318 317 316 315 314 313 312 311 310 309 308 307 306 305 304 303 302 301
300 299 298 297 296 295 294 293 292 291 290 289 288 287 286 285 284 283
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
228 227 226 225 224 223 222 221 220 219 218 217 216 215 214 213 212 211
210 209 208 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193
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
156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139
138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121
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
\^@\^@\^@\^@\^@\^@
(trimmed whole bunch of \^@)
\^@\^@\^@\^@\^@\^@\^@
---
#0 dumpsys () at ../../kern/kern_shutdown.c:487
487 if (dumping++) {
(kgdb) list *0xc01f5ca6
0xc01f5ca6 is in vm_fault (machine/atomic.h:113).
108 ATOMIC_ASM(add, char, "addb %b1,%0", v)
109 ATOMIC_ASM(subtract, char, "subb %b1,%0", v)
110
111 ATOMIC_ASM(set, short, "orw %w1,%0", v)
112 ATOMIC_ASM(clear, short, "andw %w1,%0", ~v)
113 ATOMIC_ASM(add, short, "addw %w1,%0", v)
114 ATOMIC_ASM(subtract, short, "subw %w1,%0", v)
115
116 ATOMIC_ASM(set, int, "orl %1,%0", v)
117 ATOMIC_ASM(clear, int, "andl %1,%0", ~v)
(kgdb) backtrace
#0 dumpsys () at ../../kern/kern_shutdown.c:487
#1 0xc0157553 in boot (howto=256) at ../../kern/kern_shutdown.c:316
#2 0xc0157991 in panic (fmt=0xc02b37ac "%s") at
../../kern/kern_shutdown.c:595
#3 0xc02689cf in trap_fatal (frame=0xe5f7aaac, eva=54) at
../../i386/i386/trap.c:974
#4 0xc026867d in trap_pfault (frame=0xe5f7aaac, usermode=0, eva=54) at
../../i386/i386/trap.c:867
#5 0xc02681f7 in trap (frame={tf_fs = 16, tf_es = 16, tf_ds -1072365552, tf_edi
= -1073610752, tf_esi = -1070576596,
tf_ebp = -436753524, tf_isp = -436753704, tf_ebx = 0, tf_edx = 0,
tf_ecx = -436753657, tf_eax = 1, tf_trapno = 12,
tf_err = 2, tf_eip = -1071686490, tf_cs = 8, tf_eflags = 66178,
tf_esp = -437517376, tf_ss = -1070576596})
at ../../i386/i386/trap.c:466
#6 0xc01f5ca6 in vm_fault (map=0xc0304c2c, vaddr=3221356544, fault_type=2
'\002', fault_flags=0) at ../../vm/vm_object.h:189
#7 0xc026862a in trap_pfault (frame=0xe5f7ac00, usermode=0,
eva=3221357664) at ../../i386/i386/trap.c:856
#8 0xc02681f7 in trap (frame={tf_fs = -1070596080, tf_es = -435355632,
tf_ds = 16, tf_edi = 7261280, tf_esi = -435606840,
tf_ebp = -436753340, tf_isp = -436753364, tf_ebx = -1063227532,
tf_edx = -1073609648, tf_ecx = -435606840,
tf_eax = -435606820, tf_trapno = 12, tf_err = 3, tf_eip -1071652935, tf_cs
= 8, tf_eflags = 66182, tf_esp = -1063227532,
tf_ss = -436753312}) at ../../i386/i386/trap.c:466
#9 0xc01fdfb9 in vm_page_remove (m=0xc0a06f74) at ../../vm/vm_page.c:473
#10 0xc01fe60c in vm_page_free_toq (m=0xc0a06f74) at
../../vm/vm_page.c:1104
#11 0xc01fc3fa in vm_object_terminate (object=0xe6092ac8) at
../../vm/vm_page.h:514
#12 0xc01fc2c4 in vm_object_deallocate (object=0xe6092ac8) at
../../vm/vm_object.c:399
#13 0xc01f959c in vm_map_entry_delete (map=0xe5fa0ec0, entry=0xe5ebc0f0)
at ../../vm/vm_map.c:2057
#14 0xc01f9755 in vm_map_delete (map=0xe5fa0ec0, start=0, end=3217031168)
at ../../vm/vm_map.c:2177
#15 0xc01f97e2 in vm_map_remove (map=0xe5fa0ec0, start=0, end=3217031168)
at ../../vm/vm_map.c:2202
#16 0xc014f1ff in exec_new_vmspace (imgp=0xe5f7ae18) at
../../kern/kern_exec.c:538
#17 0xc014509b in exec_elf_imgact (imgp=0xe5f7ae18) at
../../kern/imgact_elf.c:507
#18 0xc014ea28 in execve (p=0xe5ec03c0, uap=0xe5f7af80) at
../../kern/kern_exec.c:208
#19 0xc0268c85 in syscall2 (frame={tf_fs = 47, tf_es = 138674223, tf_ds
-1078001617, tf_edi = 139253888, tf_esi = 141760940,
tf_ebp = -1077937328, tf_isp = -436752428, tf_ebx = 673281932,
tf_edx = 137004432, tf_ecx = 47, tf_eax = 59, tf_trapno = 12,
tf_err = 2, tf_eip = 672964132, tf_cs = 31, tf_eflags = 659, tf_esp
= -1077938508, tf_ss = 47})
at ../../i386/i386/trap.c:1175
#20 0xc0259985 in Xint0x80_syscall ()
Cannot access memory at address 0xbfbffb50.
(kgdb)