The interrupt handler's execution time will definitely defer the execution of the process, but I think it does not steal the process's time slice (the time_slice field not subtracted).
It will definitely be substracted from the process's time slice. Because the timeslice is substracted in timer interrupt, and does not differenciate if the process is executing ISR or not. - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs