If there was a spinlock, the problem stay. > the rule simply is that you MUST NOT release and immediately re-acquire the same spinlock on the same core, becaus

If there was a spinlock, the problem stay. > the rule simply is that you MUST NOT release and immediately re-acquire the same spinlock on the same core, because as far as other cores are concerned, that's basically the same as never releasing it in the first place. https://yarchive.net/comp/linux/spinlocks.html https://yarchive.net/comp/linux/spinlocks.html Other mechanisms do exist of course.