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對於這種情況:進程B將等待進程A釋放自旋,因此預先排好? Process A: -->spin lock --> do strict call --> before unlock time int
Time int ISR: --> Process A time slice finished --> need schedule -->ISR ret --> schedule to Process B
Process B: -->spin lock for same resource --> failed --> spin wait
爲什麼spin_lock應禁用搶佔?如果不禁用搶先會發生什麼?