Hi, In "The design and implementation of 4.4BSD", the execution of workqueues, some timer events and scheduling are referred to as "software interrupts", as well as system calls. I thought only system calls would be in "soft interrupt" category as they are initiated with a software interrupt instruction.
By my definition, a hardware interrupt is one that is notified by the interrupt controller, and to my knowledge, timer events are hardware interrupts. Am I wrong? There's also a softclock and hardclock defined. It is as if, an interrupt handler for an interrupt reported on the controller, is termed as "hard", but a low-priority workqueue initiated by a later timer event is called as a "software interrupt" here. The distinction here mainly being made by their "priority". Would you confirm this? In my opinion this isn't the way to put it and software interrupts should only mean interrupts initiated by interrupt instructions. All this is mentioned in pp. 56-57 in the book and extends to other parts. Many thanks for reading, Bahadir _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
