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Subject[Question] one question about 'current' in scheduler_tick()
Hi, All.

I found scheduler_tick() use current macro to get task_struct of
current task.

I seen scheduler_tick() is called every timer interrupt at most
time. In this
case, I think scheduler_tick() is in interrupt context (enter kernel by
interrupt),
So I have a hunch that there have not thread_info which it need in
kernel stack. But
It seem it can work perfectly.

I can not understand this. Would any expert like explain clearly for
it ?

Thanks in advanced.

-liyu




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