serializing token

[Matthew Dillon]

:Is it not suitable for protection between the producer and consumer?
:Specifically, I have a driver that shares an event queue between the
:interrupt handler and a kernel thread (interrupt creates events,
:thread processes them). What is the prefered DFly scheme to protect
:the queue's head/tail pointers?
:
:-- 
:Chuck Tuffli
:Agilent Technologies, Storage Area Networking

    The answer is: don't have a queue at all, have the driver send a 
    message to the kernel thread instead.

    But if you really wanted to have a queue I would use a tail-chasing
    FIFO where the driver always and only manipulates the fifo's write
    index, and the thread always and only manipulates the fifo's read
    index.

					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>