Subversion Repositories HelenOS

Last modification

• Rev 2183 – 6434 d 12 h
• Author: jermar

• Log message:

  Continue to de-oversynchronize the kernel.
  - replace as->refcount with an atomic counter; accesses to this
  reference counter are not to be done when the as->lock mutex is held;
  this gets us rid of mutex_lock_active();
  
  Remove the possibility of a deadlock between TLB shootdown and asidlock.
  - get rid of mutex_lock_active() on as->lock
  - when locking the asidlock spinlock, always do it conditionally and with
  preemption disabled; in the unsuccessful case, enable interrupts and try again
  - there should be no deadlock between TLB shootdown and the as->lock mutexes
  - PLEASE REVIEW !!!
  
  Add DEADLOCK_PROBE's to places where we have spinlock_trylock() loops.