* Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote: > Additionally we have PREEMPT=FULL which utilizes every zero transition > of preeempt_count as a potential preemption point. Just to complete this nice new entry to Documentation/sched/: in PREEMPT=FULL there's also IRQ-return driven preemption of kernel-mode code, at almost any instruction boundary the hardware allows, in addition to the preemption driven by regular zero transition of preempt_count in syscall/kthread code. Thanks, Ingo
