2005-11-14 Paul Jakma <paul.jakma@sun.com>

2005-11-14 Paul Jakma <paul.jakma@sun.com>

	* (general) Add state to detect queue floods.  There's no sense
	  trying to be sparing of CPU resources, if the queue is
	  flooding and using ever more memory resources. we should just
	  get on with clearing the queue.
	  The sense of delay and hold were wrong way around, fix.
	* workqueue.h: (struct work_queue) Add status bitfield.  Add
	  'flood' integer to workqueue spec.  Add runs_since_clear
	  counter to workqueue.
	* workqueue.c: (work_queue_new) set defaults for delay, hold
	  and flood.
	  (work_queue_add) initial schedule should use delay, not hold.
	  (show_work_queues) Print flood field, conserve whitespace.
	  (work_queue_unplug) use delay, not hold.
	  (work_queue_run) consecutive runs should be seperated by hold
	  time, not delay.
	  Keep track of number of consecutive runs, go into 'overdrive'
	  if queue is being flooded, we can't avoid making heavy use of
	  resources, better to use CPU than ever more RAM.