NetBSD/amd64 5.0_RC1 panic

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

        Hello,

my NetBSD/amd64 system panic overnight and got hung while trying to dump.
Here is what I could find out with "ddb" before I had to reboot:

panic: lock error
Begin traceback...
uvm_fault(0xffff8000518a0e60, 0x0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff8038e43c cs 8 rflags 10246 cr2  3f8 cpl 0 rsp fff
f8000518d2330
panic: trap
Faulted in mid-traceback; aborting...
dumping to dev 18,1 offset 8392359
dump ahcisata0 port 0: device present, speed: 1.5Gb/s
5118 5117 5116 5115 5114 5113 5112 5111 5110 5109 5108 5107 5106 5105 5104 5103 
5
102 5101 5100 5099 5098 5097 5096 5095 5094 5093 5092 5091 5090 5089 5088 5087 5
086 5085 5084 5083 5082 5081 5080 5079 5078 5077 5076 5075 5074 5073 5072 5071 5
070 5069 5068 5067 5066 5065 5064 5063 5062 5061 5060 5059 5058 5057 5056 5055 5
054 5053 5052 5051 5050 5049 5048 5047 5046 5045 5044 5043 5042 5041 5040 5039 5
038 5037 5036 5035 5034 5033 5032 5031 5030 5029 5028 5027 5026 5025 5024 5023 5
022 5021 5020 5019 5018 5017 5016 5015 5014 5013 5012 5011 5010 5009 5008 5007 5
006 5005 5004 5003 5002 5001 5000 4999 4998 4997 4996 4995 4994 4993 4992 4991 4
990 4989 4988 4987 4986 4985 4984 4983 4982 4981 4980 4979 4978 4977 4976 4975 4
974 4973 4972 4971 4970 4969 4968 4967 4966 4965 4964 4963 4962 4961 4960 4959 4
958 4957 4956 4955 4954 4953 4952 4951 4950 4949 4948 4947 4946 4945 4944 4943 4
942 4941 4940 4939 4938 4937 4936 4935 4934 4933 4932 4931 4930 4929 4928 4927 4
926 4925 4924 4923 4922 4921 4920 4919 4918 4917 4916 4915 4914 4913 4912 4911 4
910 4909 4908 4907 4906 4905 4904 4903 4902 4901 4900 4899 4898 4897 4896 4895 4
894 4893 4892 4891 4890 4889 4888 4887 4886 4885 4884 4883 4882 4881 4880 4879 4
878 4877 4876 4875 4874 4873 4872 4871 4870 4869 4868 4867 4866 4865 4864 4863 4
862 4861 4860 4859 4858 4857 4856 4855 4854 4853 4852 4851 4850 4849 4848 4847 4
846 4845 4844 4843 4842 4841 4840 4839 4838 4837 4836 4835 4834 4833 4832 4831 4
830 4829 4828 4827 4826 4825 4824 4823 4822 4821 4820 4819 4818 4817 4816 4815 4
814 4813 4812 4811 4810 4809 4808 4807 4806 4805 4804 4803 4802 4801 4800 4799 4
798 4797 4796 4795 4794 4793 4792 4791 4790 4789 4788 4787 4786 4785 4784 4783 4
782 4781 4780 4779 4778 4777 4776 4775 4774 4773 4772 4771 4770 4769 4768 4767 4
766 4765 4764 4763 4762 4761 4760 4759 4758 4757 4756 4755 4754 4753 4752 4751 4
750 4749 4748 4747 4746 4745 4744 4743 4742 4741 4740 4739 4738 4737 4736 4735 4
734 4733 4732 4731 4730 4729 4728 4727 4726 4725 4724 4723 4722 4721 4720 4719 4
718 4717 4716 4715 4714 4713 4712 4711 4710 4709 4708 4707 4706 4705 4704 4703 4
702 4701 4700 4699 4698 4697 4696 4695 4694 4693 4692 4691 4690 4689 4688 4687 4
686 4685 4684 4683 4682 4681 4680 4679 4678 4677 4676 4675 4674 4673 4672 4671 4
670 4669 4668 4667 4666 4665 4664 4663 4662 4661 4660 4659 4658 4657 4656 4655 4
654 4653 4652 4651 4650 4649 4648 4647 4646 4645 4644 4643 4642 4641 4640 4639 4
638 4637 4636 4635 4634 4633 4632 4631 4630 4629 4628 4627 4626 4625 4624 4623 4
622 4621 4620 4619 4618 4617 4616 4615 4614 4613 4612 4611 4610 4609 4608 4607 4
606 4605 4604 4603 4602 4601 4600 4599 4598 4597 4596 4595 4594 4593 4592 4591 4
590 4589 4588 4587 4586 4585 4584 4583 4582 4581 4580 4579 4578 4577 4576 4575 4
574 4573 4572 4571 4570 4569 4568 4567 4566 4565 4564 4563 4562 4561 4560 4559 4
558 4557 4556 4555 4554 4553 4552 4551 4550 4549 panic: wddump: try again
Faulted in mid-traceback; aborting...
dumping to dev 18,1 offset 8392359
dump fatal breakpoint trap in supervisor mode
trap type 1 code 0 rip ffffffff8038cb85 cs 8 rflags 202 cr2  ffff8000500bd0df cp
l 8 rsp ffff80004e1dfa68
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff8038ea3b cs 8 rflags 10247 cr2  4b0 cpl 8 rsp fff
f80004e1df450
db{0}> bt
raidlock() at netbsd:raidlock+0x36
raiddump() at netbsd:raiddump+0xaa
cpu_dump() at netbsd:cpu_dump+0xbf
dodumpsys() at netbsd:dodumpsys+0x126
dumpsys() at netbsd:dumpsys+0x1d
panic() at netbsd:panic+0x25b
wddump() at netbsd:wddump+0x28e
raiddump() at netbsd:raiddump+0x20f
dodumpsys() at netbsd:dodumpsys+0x2cc
dumpsys() at netbsd:dumpsys+0x1d
panic() at netbsd:panic+0x25b
trap() at netbsd:trap+0x314
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff8038ea3b cs 8 rflags 10247 cr2  4b0 cpl 8 rsp 
ffff80004e1df450
kernel: page fault trap, code=0
Faulted in DDB; continuing...

Any ideas want went wrong? How do I find out where it crashed?

        Kind regards

-- 
Matthias Scheler                                  http://zhadum.org.uk/