* Russell King <rmk@xxxxxxxxxxxxxxxx> wrote: > On Fri, Mar 26, 2010 at 12:06:44AM -0000, Thomas Gleixner wrote: > > The following patch series removes the IRQF_DISABLED functionality > > from the core interrupt code and runs all interrupt handlers with > > interrupts disabled. > > As was covered in previous discussions, what about drivers such as SMC91x > which take a long time to retrieve packets from the hardware? Always running > handlers with IRQs disabled will kill things such as serial on these > platforms. As long as it's rare (which it is) i dont see a problem: you can enable interrupts in the handler by using local_irq_enable(), like the IDE PIO drivers do. That way it's documented a bit better as well, because it shows the precise source of the latency, with a big comment explaining it, etc. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
