Thread: How do I determine if a task is i real-time task in schedule()?

Hi, I'm currently working with a custom scheduler in linux kernel 2.6.23.9. Or actually I'm porting a scheduler I all ready made in Solaris, anyway in sched.c in the schedule() function, I need to determine if a task is a real-time task or not, what is the best way to do this? Do real-time tasks got any flag set that I can check?

Also a question about jiffies, how many ns is a jiffy?

This macro, in sched.c says:

Code:

#define NS_TO_JIFFIES(TIME) ((TIME) / (1000000000 / HZ))

But where is HZ set? What is the default value?

Thanks.