Messages in this thread | | | Date | Tue, 19 Sep 2023 09:21:35 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH v2 7/9] sched: define TIF_ALLOW_RESCHED |
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* Thomas Gleixner <tglx@linutronix.de> 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
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