On Tue, 07 Nov 2023 15:43:40 -0800 Ankur Arora <ankur.a.arora@xxxxxxxxxx> wrote: > > The TIF_NEED_RESCHED flag is evaluated at all three of the preemption > points. TIF_NEED_RESCHED_LAZY only needs to be evaluated at ret-to-user. > > ret-to-user ret-to-kernel preempt_count() > NEED_RESCHED_LAZY Y N N > NEED_RESCHED Y Y Y > > Based on how various preemption models set the flag they would cause > preemption at: I would change the above to say "set the NEED_SCHED flag", as "set the flag" is still ambiguous. Or am I still misunderstanding the below table? > > ret-to-user ret-to-kernel preempt_count() > none Y N N > voluntary Y Y Y > full Y Y Y > -- Steve
