In reference to DUX Dave Cherkus <cherkus@homerun.unimaster.com> writes:

>It's malloc also has debug modes that do auditing, leak detection,
>internal consistency checking and even a mode where virtual addresses
>are never reused and are always unmapped after being freed so any 
>access to that address will fault.  This is great for finding use
>of pointers after freeing the memory.

Sure, in a debug kernel.  I was talking about the performance kernel 
clients use in the field.  The "use after freeing" bugs NEVER show up
in pre-release testing.  *8^)))

Paul