panic: ia64 r255811: deadlkres: possible deadlock detected for 0xe000000012d07b00, blocked for 902743 ticks

[Anton Shterenlikht]

>From davide.italiano at gmail.com Wed Sep 25 16:12:47 2013
>
>Can you please paste the output of 'show locks', 'show alllocks',
>'show lockedvnods' at least?
>Ideally you should provide all the informations listed here.
>http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-deadlocks.html

ok, I'll need to study this.

I've in the kernel:

# Debugging support.  Always need this:
options         KDB             # Enable kernel debugger support.
options         KDB_TRACE       # Print a stack trace for a panic.
# For full debugger support use (turn off in stable branch):
options         DDB             # Support DDB
options         GDB             # Support remote GDB
options         DEADLKRES       # Enable the deadlock resolver
options         INVARIANTS      # Enable calls of extra sanity checking
options         INVARIANT_SUPPORT # required by INVARIANTS
options         WITNESS         # Enable checks to detect deadlocks and cycles
options         WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed
options         MALLOC_DEBUG_MAXZONES=8 # Separate malloc(9) zones

so I'm missing DEBUG_LOCKS, DEBUG_VFS_LOCKS and DIAGNOSTIC
from the handbook list.

What about all debug options in GENERIC which are
not mentioned in your link? Specifically, do I need
to have DEADLKRES?

I've never used trace.
Also, I'm getting a panic, so cannot run ps, I think.

Thanks

Anton