Re: ucom_free Fatal trap on shutdown / module unload

On 06/30/14 06:01, Lundberg, Johannes wrote:
> As I mention in earlier mail, it is when I comment out following lines it
> works
>
> # 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       # Extra sanity checks of internal
> structures, 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
>
>
> I have tried different levels of debugging and I have narrowed it down to
> INVARIANTS.
>

Hi,

What happens if you put ucom and uhso in the kernel config file, instead 
of loading them as modules.

Please find attached a patch you can try. It ensures that the ucom mtx 
is not destroyed before we are finished using it at shutdown.

--HPS