On Fri, Jan 24, 2020 at 01:51:34PM -0500, Waiman Long wrote: < 71 lines of garbage > > > You can use the in_task() macro in include/linux/preempt.h. This is > > just a percpu preempt_count read and test. If in_task() is false, it > > is in a {soft|hard}irq or nmi context. If it is true, you can check > > the rt_task() macro to see if it is an RT task. That will access to > > the current task structure. So it may cost a little bit more if you > > want to handle the RT task the same way. > > > We may not need to do that for softIRQ context. If that is the case, you > can use in_irq() which checks for hardirq and nmi only. Peter, what is > your thought on that? Can you lot please start trimming emails when you reply?