Matthew Dharm writes:
> Spinlocks can give me mutual exclusion, but what I need to do is sleep
> until there is something in the queue to process. This is a textbook
> application of semaphores -- or is the kernel implementation of semaphores
> not so textbook?
Use wait queues. They have both non-interruptible and interruptible
versions. The interruptible version uses TASK_INTERRUPTIBLE, which
won't be counted as a running process.
_____
|_____| ------------------------------------------------- ---+---+-
| | Russell King rmk@arm.linux.org.uk --- ---
| | | | http://www.arm.linux.org.uk/~rmk/aboutme.html / / |
| +-+-+ --- -+-
/ | THE developer of ARM Linux |+| /|\
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