DFly-stable as of April 1st crashed, but no crash dump was possible due to ips driver being unable to do crash dumps

[Tomaž Borštnar]

Matthew Dillon wrote:
:Matthew Dillon wrote:
:>     Turn off sync_on_panic and see if you can get a dump.
:> 
:>     sysctl kern.sync_on_panic=0
:
:OK, same error as before (in less than 12 hours!):
:
:Warning: cache_inval_vp: race-A detected on pgstat.stat
:
:
:Fatal trap 12: page fault while in kernel mode
:mp_lock = 00000000; cpuid = 0; lapic.id = 00000000
:fault virtual address = 0x28
:fault code = supervisor read, page not present
:instruction pointer = 0x8:0xc028feb7
:stack pointer = 0x10:0xe04afc04
:frame pointer = 0x10:0xe04afc08
: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 = Idle
:current thread = pri 44 (CRIT)
:interrupt mask = none <- SMP: XXX
:trap number
:panic: page fault
:mp_lock = 00000000; cpuid = 0; lapic.id = 00000000
:boot() called on cpu#0
:
:syncing disks...
:
:
:--------------------------
:
:Tomaž

    Do you get a debugger prompt? 
nope, "syncing disks..." is last thing printed on console. I have 
DDB_UNATTENDED in kernel config file.

We need at least to get a stack
    trace ('trace' command from the debugger prompt).  A kernel
    core would be even more useful.
Never been able to get into ddb on this machine if I remember correctly. 
Maybe define DDB_TRACE to at least get something?

    I also need your kernel binary for any of the numbers to make any
    sense.
Ok, will mail you link to kernel file.

Tomaž