![]() | |||||||||||||
Messages in this thread |
On Sat, 2002-01-12 at 13:54, 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) > 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 don't preempt while IRQ are disabled. Robert Love - 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/ | ||||||||||||
| Last update: 2005-03-22 12:15 [W:1.496 / U:0.100 seconds] ©2003-2008 Jasper Spaans | |||||||||||||