linux-kernel

What does TIF_NEED_RESCHED do?

What is the purpose of TIF_NEED_RESCHED in a Linux scheduler (say CFS)? In case of writing a new scheduling class, can this flag be used? If yes, where and how can this flag be used for a new scheduling class?

Solution

  • TIF_NEED_RESCHED is one of the thread information flags. It tells that the schedule needs to be called while interrupt and userspace return paths. See the __schedule function description here...