I went from 7-stable as of Mar 6 2016 to 7-stable as of Jul 24 2016 on an amd64 server and this morning it crashed without an obvious reason. It dropped (as configured) into ddb and executed sync, savecore did the rest.
Now I'm trying to figure out what happened using crash(8), but: 1. The (gunzip'ed) kernel image in /var/crash seems awfully small: | -rw------- 1 root wheel 554839 Jul 26 09:48 /var/crash/netbsd.3 compared with the kernel that the machine booted | -rwxr-xr-x 1 root wheel 5498863 Jul 24 22:03 /DEDIKERN Is this right? 2. I get bogus register information and a diagnostic from crash(8): | crash> show registers | ds 0 | es 0 | fs 0 | gs 0 | rdi 0 | rsi 0 | rbp fffffe80402bf860 | rbx 0 | rdx 0 | rcx 0 | rax 0 | r8 0 | r9 0 | r10 0 | r11 0 | r12 0 | r13 0 | r14 0 | r15 0 | rip 0 | cs 0 | rflags 0 | rsp fffffe80402bf820 | ss 0 | crash: kvm_read(0x0, 1): invalid translation (invalid PTE) The last line comes on crash's stderr, I don't understand what it's telling me; but nearly all the registers esp. rip being 0 can't be right, can it?
