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Interrupt handlers and mutex
Help request -- Mutex(9) indicates that mutex replaces the spl(9) system.
(1) When writing an interrupt handler, should the handler acquire a spin mutex
before modifying some IO that may be accessed also by a LWP?
(2) What happens when the interrupt handler cannot acquire the mutex? Will the
LWP that holds it ever be able to run again?
(3) Will a LWP that holds a spin mutex be pre-empted by the scheduler?
Thanks to anyone who might offer some help to this poor soul --
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