On 16/11/2011 07:43, Bjoern A. Zeeb wrote: > Hey, > > we have seen this or a very similar panic for about 1 year now once in > a while and I think I reported it before; this is FreeBSD as guest on
Yes, IIRC I've also reported it before; it crashes randomly, when the machine is not doing anything with the cdrom. As a workaround, I now remove the cdrom device from vmware instances. > vmware. Seems it was a double panic this time. Could someone please > see what's going on there? It was on 8.x-STABLE in the past and this > is 8.2-RELEASE-p4. > > Thanks > /bz > > acd0: WARNING - READ_TOC taskqueue timeout - completing request directly > > > Fatal trap 12: page fault while in kernel mode > cpuid = 4; apic id = 04 > fault virtual address = 0x1f4 > fault code = supervisor read, page not present > instruction pointer = 0x20:0xc08a1e9f > > stack pointer = 0x28:0xe6ad5b9c > Fatal trap 12: page fault while in kernel mode > frame pointer = 0x28:0xe6ad5bb4 > cpuid = 2; > code segment = base 0x0, limit 0xfffff, type 0x1bapic id = 02 > = DPL 0, pres 1, def32 1, gran 1 > fault virtual address = 0x1f4 > processor eflags = > fault code = supervisor read, page not presentinterrupt > enabled, > instruction pointer = 0x20:0xc08a1e9fresume, > stack pointer = 0x28:0xe8e9e808IOPL = 0 > frame pointer = 0x28:0xe8e9e820 > current process = > code segment = base 0x0, limit 0xfffff, type 0x1b12 (swi6: > task queue) > = DPL 0, pres 1, def32 1, gran 1 > trap number = 12 > processor eflags = interrupt enabled, > panic: page faultresume, > cpuid = 4IOPL = 0 > current process = > KDB: stack backtrace:25162 (bsnmpd) > > trap number = 12#0 0xc08e0d07 at kdb_backtrace+0x47 > > #1 0xc08b1dc7 at panic+0x117 > #2 0xc0be4b53 at trap_fatal+0x323 > #3 0xc0be4dd0 at trap_pfault+0x270 > #4 0xc0be5315 at trap+0x465 > #5 0xc0bcbecc at calltrap+0x6 > #6 0xc08b0d86 at _sema_post+0x46 > #7 0xc056fa47 at ata_completed+0x727 > #8 0xc08eb97a at taskqueue_run_locked+0xca > #9 0xc08ebc8a at taskqueue_run+0xaa > #10 0xc08ebd53 at taskqueue_swi_run+0x13 > #11 0xc088903b at intr_event_execute_handlers+0x13b > #12 0xc088a75b at ithread_loop+0x6b > #13 0xc0886d51 at fork_exit+0x91 > #14 0xc0bcbf44 at fork_trampoline+0x8 > Uptime: 5d20h1m56s > > > (gdb) l *ata_completed+0x727 > 489 (request->callback)(request); > 490 else > 491 sema_post(&request->done); > 492 > 493 /* only call ata_start if channel is present */ > 494 if (ch) > 495 ata_start(ch->dev); > 496 } > 497 > 498 void > >
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