Hi, ________________________________________ From: Dave Hylands [dhylands@gmail.com] Subject: Re: spin_lock and scheduler confusion
I guess timeslice expire case is not as same as preemption. Or may be I am terribly wrong.
You shouldn't be holding a spinlock for periods of time approaching the length of a timeslice. The timer interrupt is what determines the end of a timeslice. No timer interrupt, no end of a timeslice. Preemption is also triggered by the timer interrupt, or by releasing a resource that a higher priority task is waiting for.
thanks, it is much clear now.
Dave Hylands
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