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On January 12, 2002 07:54 pm, Alan Cox wrote: > Another example is in the network drivers. The 8390 core for one example > carefully disables an IRQ on the card so that it can avoid spinlocking on > uniprocessor boxes. > > So with pre-empt this happens > > driver magic > disable_irq(dev->irq) inc task's preempt inhibit > PRE-EMPT: > [large periods of time running other code] > PRE-EMPT: > We get back and we've missed 300 packets, the serial port sharing > the IRQ has dropped our internet connection completely. We are ok dec tasks's preempt inhibit jmp if nonzero -- Daniel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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