Hello... > I have a doubt regarding interrupt handling and bottom halves. > I have registered an interrupt handler which is not a shared > interrupt. When the interrupt occurs, the interrupt handler is called > which schedules the tasklet and is proccessed During the proccessing > of the tasklet, if the same interrupt comes again, the interrupt will > the handler again. At that time, will the tasklet be scheduled again > after the current executing tasklet ?? Can anybody please explain > this scenario briefly ? Yes, you can still schedule the new tasklet so it is executed right after the last same tasklet. I never tried it by myself, but according to what I read on Linux kernel development, unless the current tasklet's state is still in TASKLET_STATE_SCHED and/or disabled, you are free to reschedule your tasklet (inside the interrupt handler) This is possible, thanks to the fact that tasklet_action() and tasklet_hi_action() always check for pending tasklet continously. When the number of pending tasklets are above certain limits, big chance it is executed by ksoftirqd, not when do_irq() is about to return to kernel/user context. But you don't have to worry about it. regards Mulyadi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
