we use hightly loaded nfsv3/udp server with 5 fbsd nfs client
all with 3.2-stable
server panics one/two time a day with:
panic: ufs_dirbad: bad dir
then reboot ...
another panic:
panic: vm_fault: fault on nofault entry, addr: ce4c9000
in this case server write:
syncing disks...
and hangs ... after seting vfs.ffs.doreallocblks=0 server works without
panic about 8 days, and then reboot with:
Fatal trap 12: page fault while in kernel mode
----------------
then 3 examples of regular panics, two at ../../ufs/ufs/ufs_lookup.c:238 :
ep = (struct direct *)((char *)bp->b_data + entryoffsetinblock);
and one at ../../ufs/ufs/ufs_lookup.c:566 :
if ((mp->mnt_stat.f_flags & MNT_RDONLY) == 0)
panic("ufs_dirbad: bad dir");
-------------------------------------------------------------------------
this is backtrace of panic from debuger (vfs.ffs.doreallocblks=1)
when server hangs while sincing disks ...
-------------------------------------------------------------------------
# gdb -k kernel.28 vmcore.28
GNU gdb 4.18
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"...
IdlePTD 2744320
initial pcb at 227b10
panicstr: from debugger
panic messages:
---
panic: vm_fault: fault on nofault entry, addr: ce4c9000
syncing disks... panic: from debugger
(da1:ahc1:0:1:0): SYNCHRONIZE CACHE. CDB: 35 0 0 0 0 0 0 0 0 0
(da1:ahc1:0:1:0): ILLEGAL REQUEST asc:20,0
(da1:ahc1:0:1:0): Invalid command operation code
dumping to dev 20401, offset 1691306
dump 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
---
#0 boot (howto=260) at ../../kern/kern_shutdown.c:285
285 dumppcb.pcb_cr3 = rcr3();
(kgdb) back
#0 boot (howto=260) at ../../kern/kern_shutdown.c:285
#1 0xc013cf39 in panic (fmt=0xc01fb0f8 "from debugger")
at ../../kern/kern_shutdown.c:446
#2 0xc01221dd in db_panic (addr=-1071763569, have_addr=0, count=-1,
modif=0xd302f76c "") at ../../ddb/db_command.c:432
#3 0xc012217d in db_command (last_cmdp=0xc0213aa4, cmd_table=0xc0213904,
aux_cmd_tablep=0xc0225818) at ../../ddb/db_command.c:332
#4 0xc0122242 in db_command_loop () at ../../ddb/db_command.c:454
#5 0xc01246bb in db_trap (type=3, code=0) at ../../ddb/db_trap.c:71
#6 0xc01e2d6a in kdb_trap (type=3, code=0, regs=0xd302f85c)
at ../../i386/i386/db_interface.c:157
#7 0xc01ebd14 in trap (frame={tf_es = 16, tf_ds = 16, tf_edi = -1071815412,
tf_esi = 134, tf_ebp = -754780000, tf_isp = -754780028, tf_ebx = 0,
tf_edx = -1071600628, tf_ecx = -1072984320, tf_eax = 38, tf_trapno = 3,
tf_err = 0, tf_eip = -1071763569, tf_cs = 8, tf_eflags = 598,
tf_esp = -1071600644, tf_ss = -1071611704}) at ../../i386/i386/trap.c:548
#8 0xc01e2f8f in Debugger (msg=0xc02080c8 "manual escape to debugger")
at ../../i386/i386/db_interface.c:317
#9 0xc01de778 in scgetc (kbd=0xc0246600, flags=2)
at ../../dev/syscons/syscons.c:3726
#10 0xc01d99f8 in sckbdevent (thiskbd=0xc0246600, event=0, arg=0x0)
at ../../dev/syscons/syscons.c:822
#11 0xc01d63d7 in atkbd_intr (kbd=0xc0246600, arg=0x0)
---Type <return> to continue, or q <return> to quit---
at ../../dev/kbd/atkbd.c:563
#12 0xc01efc1c in atkbd_isa_intr (unit=0) at ../../i386/isa/atkbd_isa.c:84
#13 0xc01e4a7a in vec1 ()
#14 0xc0159d93 in getblk (vp=0xd2d77ec0, blkno=131184, size=8192, slpflag=0,
slptimeo=0) at ../../kern/vfs_bio.c:1424
#15 0xc0158761 in bread (vp=0xd2d77ec0, blkno=131184, size=8192, cred=0x0,
bpp=0xd302fa30) at ../../kern/vfs_bio.c:282
#16 0xc01bbf98 in ffs_update (vp=0xd3ddbd80, waitfor=0)
at ../../ufs/ffs/ffs_inode.c:98
#17 0xc01c0766 in ffs_fsync (ap=0xd302fab8) at ../../ufs/ffs/ffs_vnops.c:258
#18 0xc01beb8b in ffs_sync (mp=0xc3004a00, waitfor=2, cred=0xc1138000,
p=0xc024bb7c) at vnode_if.h:499
#19 0xc01619c3 in sync (p=0xc024bb7c, uap=0x0) at ../../kern/vfs_syscalls.c:549
#20 0xc013cae1 in boot (howto=256) at ../../kern/kern_shutdown.c:203
#21 0xc013cf39 in panic (
fmt=0xc02067ce "vm_fault: fault on nofault entry, addr: %lx")
at ../../kern/kern_shutdown.c:446
#22 0xc01c8b6e in vm_fault (map=0xc023e7b8, vaddr=3461124096,
fault_type=1 '\001', fault_flags=0) at ../../vm/vm_fault.c:232
#23 0xc01ebf40 in trap_pfault (frame=0xd302fc40, usermode=0, eva=3461126819)
at ../../i386/i386/trap.c:824
#24 0xc01ebbf2 in trap (frame={tf_es = 16, tf_ds = -1012727792,
tf_edi = 35487, tf_esi = -1012706816, tf_ebp = -754778880,
---Type <return> to continue, or q <return> to quit---
tf_isp = -754779032, tf_ebx = -833840481, tf_edx = -847649360,
tf_ecx = 8191, tf_eax = 43679, tf_trapno = 12, tf_err = 0,
tf_eip = -1071900669, tf_cs = 8, tf_eflags = 66182, tf_esp = -747118080,
tf_ss = -754778332}) at ../../i386/i386/trap.c:437
#25 0xc01c1803 in ufs_lookup (ap=0xd302fd3c) at ../../ufs/ufs/ufs_lookup.c:238
#26 0xc01c6615 in ufs_vnoperate (ap=0xd302fd3c)
at ../../ufs/ufs/ufs_vnops.c:2299
#27 0xc015bb48 in vfs_cache_lookup (ap=0xd302fd98) at vnode_if.h:55
#28 0xc01c6615 in ufs_vnoperate (ap=0xd302fd98)
at ../../ufs/ufs/ufs_vnops.c:2299
#29 0xc015e01d in lookup (ndp=0xd302ff00) at vnode_if.h:31
#30 0xc015daf0 in namei (ndp=0xd302ff00) at ../../kern/vfs_lookup.c:152
#31 0xc01652bf in vn_open (ndp=0xd302ff00, fmode=1538, cmode=128)
at ../../kern/vfs_vnops.c:88
#32 0xc016201d in open (p=0xd2f5d160, uap=0xd302ff94)
at ../../kern/vfs_syscalls.c:935
#33 0xc01ec523 in syscall (frame={tf_es = 39, tf_ds = 39,
tf_edi = -1077954700, tf_esi = -1077957272, tf_ebp = -1077944932,
tf_isp = -754778140, tf_ebx = 0, tf_edx = 33, tf_ecx = 0, tf_eax = 5,
tf_trapno = 7, tf_err = 2, tf_eip = 671740392, tf_cs = 31,
tf_eflags = 582, tf_esp = -1077963708, tf_ss = 39})
at ../../i386/i386/trap.c:1100
#34 0xc01e36bc in Xint0x80_syscall ()
---Type <return> to continue, or q <return> to quit---
#35 0x804db00 in ?? ()
#36 0x8049425 in ?? ()
(kgdb)
-------------------------------------------------------------------------
this is backtrace (vfs.ffs.doreallocblks=1) when server reboots ...
-------------------------------------------------------------------------
# gdb -k kernel.30 vmcore.30
GNU gdb 4.18
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"...
IdlePTD 2744320
initial pcb at 227b10
panicstr: ufs_dirbad: bad dir
panic messages:
---
panic: ufs_dirbad: bad dir
syncing disks... 95 10 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 giving up
(da1:ahc1:0:1:0): SYNCHRONIZE CACHE. CDB: 35 0 0 0 0 0 0 0 0 0
(da1:ahc1:0:1:0): ILLEGAL REQUEST asc:20,0
(da1:ahc1:0:1:0): Invalid command operation code
dumping to dev 20401, offset 1691306
dump 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
---
#0 boot (howto=256) at ../../kern/kern_shutdown.c:285
285 dumppcb.pcb_cr3 = rcr3();
(kgdb) back
#0 boot (howto=256) at ../../kern/kern_shutdown.c:285
#1 0xc013cf39 in panic (fmt=0xc0206187 "ufs_dirbad: bad dir")
at ../../kern/kern_shutdown.c:446
#2 0xc01c1f8e in ufs_dirbad (ip=0xc3088300, offset=51104,
how=0xc0206141 "mangled entry") at ../../ufs/ufs/ufs_lookup.c:566
#3 0xc01c1832 in ufs_lookup (ap=0xd2dd5ad8) at ../../ufs/ufs/ufs_lookup.c:243
#4 0xc01c6615 in ufs_vnoperate (ap=0xd2dd5ad8)
at ../../ufs/ufs/ufs_vnops.c:2299
#5 0xc015bb48 in vfs_cache_lookup (ap=0xd2dd5b34) at vnode_if.h:55
#6 0xc01c6615 in ufs_vnoperate (ap=0xd2dd5b34)
at ../../ufs/ufs/ufs_vnops.c:2299
#7 0xc015e01d in lookup (ndp=0xd2dd5d94) at vnode_if.h:31
#8 0xc019da95 in nfs_namei (ndp=0xd2dd5d94, fhp=0xd2dd5d0c, len=2,
slp=0xc2fa5e00, nam=0xc30e1950, mdp=0xd2dd5c48, dposp=0xd2dd5c44,
retdirp=0xd2dd5c2c, p=0xd2d7bf40, kerbflag=0, pubflag=0)
at ../../nfs/nfs_subs.c:1662
#9 0xc01866d3 in nfsrv_lookup (nfsd=0xc3239600, slp=0xc2fa5e00,
procp=0xd2d7bf40, mrq=0xd2dd5e34) at ../../nfs/nfs_serv.c:476
#10 0xc019f562 in nfssvc_nfsd (nsd=0xd2dd5e94, argp=0x8071bb8 "", p=0xd2d7bf40)
at ../../nfs/nfs_syscalls.c:656
#11 0xc019ee7d in nfssvc (p=0xd2d7bf40, uap=0xd2dd5f94)
at ../../nfs/nfs_syscalls.c:342
#12 0xc01ec523 in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 16,
---Type <return> to continue, or q <return> to quit---
tf_esi = 0, tf_ebp = -1077944892, tf_isp = -757243932, tf_ebx = 0,
tf_edx = -1077945288, tf_ecx = 0, tf_eax = 155, tf_trapno = 12,
tf_err = 2, tf_eip = 134518940, tf_cs = 31, tf_eflags = 642,
tf_esp = -1077945280, tf_ss = 39}) at ../../i386/i386/trap.c:1100
#13 0xc01e36bc in Xint0x80_syscall ()
#14 0x80480e9 in ?? ()
(kgdb)
-------------------------------------------------------------------------
this is backtrace (vfs.ffs.doreallocblks=0) when server reboots
after 8 days of work ...
-------------------------------------------------------------------------
# gdb -k kernel.31 vmcore.31
GNU gdb 4.18
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"...
IdlePTD 2744320
initial pcb at 227b10
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xce29867c
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc01c1803
stack pointer = 0x10:0xd2ef2d1c
frame pointer = 0x10:0xd2ef2da0
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 = 11741 (uux)
interrupt mask =
trap number = 12
panic: page fault
syncing disks... 25 5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 giving up
(da1:ahc1:0:1:0): SYNCHRONIZE CACHE. CDB: 35 0 0 0 0 0 0 0 0 0
(da1:ahc1:0:1:0): ILLEGAL REQUEST asc:20,0
(da1:ahc1:0:1:0): Invalid command operation code
dumping to dev 20401, offset 1691306
dump 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
---
#0 boot (howto=256) at ../../kern/kern_shutdown.c:285
285 dumppcb.pcb_cr3 = rcr3();
(kgdb) back
#0 boot (howto=256) at ../../kern/kern_shutdown.c:285
#1 0xc013cf39 in panic (fmt=0xc020bcdb "page fault")
at ../../kern/kern_shutdown.c:446
#2 0xc01ec2da in trap_fatal (frame=0xd2ef2ce0, eva=3458827900)
at ../../i386/i386/trap.c:942
#3 0xc01ebf93 in trap_pfault (frame=0xd2ef2ce0, usermode=0, eva=3458827900)
at ../../i386/i386/trap.c:835
#4 0xc01ebbf2 in trap (frame={tf_es = 16, tf_ds = -1012793328,
tf_edi = 13944, tf_esi = -1012734208, tf_ebp = -756077152,
tf_isp = -756077304, tf_ebx = -836139400, tf_edx = -847635744,
tf_ecx = 8191, tf_eax = 374392, tf_trapno = 12, tf_err = 0,
tf_eip = -1071900669, tf_cs = 8, tf_eflags = 66182, tf_esp = -739090816,
tf_ss = -756076836}) at ../../i386/i386/trap.c:437
#5 0xc01c1803 in ufs_lookup (ap=0xd2ef2ddc) at ../../ufs/ufs/ufs_lookup.c:238
#6 0xc01c6615 in ufs_vnoperate (ap=0xd2ef2ddc)
at ../../ufs/ufs/ufs_vnops.c:2299
#7 0xc015bb48 in vfs_cache_lookup (ap=0xd2ef2e38) at vnode_if.h:55
#8 0xc01c6615 in ufs_vnoperate (ap=0xd2ef2e38)
at ../../ufs/ufs/ufs_vnops.c:2299
#9 0xc015e01d in lookup (ndp=0xd2ef2eb8) at vnode_if.h:31
#10 0xc015daf0 in namei (ndp=0xd2ef2eb8) at ../../kern/vfs_lookup.c:152
#11 0xc01631bc in stat (p=0xd2e6ffa0, uap=0xd2ef2f94)
at ../../kern/vfs_syscalls.c:1614
---Type <return> to continue, or q <return> to quit---
#12 0xc01ec523 in syscall (frame={tf_es = 39, tf_ds = -1078001625,
tf_edi = -1077945600, tf_esi = -1077945616, tf_ebp = -1077945640,
tf_isp = -756076572, tf_ebx = 266344, tf_edx = 266355, tf_ecx = 0,
tf_eax = 188, tf_trapno = 12, tf_err = 7, tf_eip = 141013, tf_cs = 31,
tf_eflags = 646, tf_esp = -1077945748, tf_ss = 39})
at ../../i386/i386/trap.c:1100
#13 0x226d5 in ?? ()
#14 0x651a in ?? ()
#15 0x65ad in ?? ()
#16 0x30fe in ?? ()
#17 0x10d3 in ?? ()
(kgdb)
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