On Sun, 05 Jun 2011, Armin Steinhoff wrote: > Nicholas Mc Guire wrote: >> On Sat, 04 Jun 2011, Monica Puig-Pey wrote: >> >>> Hello, >>> I'm studying how to develop drivers in a real time OS and how do they >>> work. I'm using Ubuntu 10.04 with the 2.6.31-11-rt patch installed. >>> I would like to know the priority when executing open(), read(), write() >>> and close() operations. >>> In my example the thread which is using the driver runs with 10 RTPRIO, >>> but I don't know what happens in kernel context with the priority when >>> running the I/O operations. >>> Thank you for your help, I don't know where to learn about this. >>> >> [] >> Also when using bottom half mechanisms you need to take into account the >> priority of the kernel thread that manages the defered work items, so >> rt-drivers may have a different structure than normal drivers. > > That's the reason why I prefer UIO based user space drivers ! > ...and how to resolve DMA ? if DMA were resolved cleanly I would agree. hofrat -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
