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29e9c7bf01
When we get a clock interrupt, we should not call sched() when the process is not in "Running" state as it is already committed to call sched() itself. (An example is qlock(), just after the unlock() call). As this is basically the same check as done in preempted(), unify both and add a "clockintr" argument to preempted(). Then most trap handlers just become: preempted(irq()); Also, we do not want to call preempted() for traps, as the trap handler has just setup some machine state to resolve the trap. We can wait for the clock interrupt if we really need the preempt. |
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