Re: 2.6.8-rc3-mm2

[Ingo Molnar]

* Russell King <rmk+lkml@xxxxxxxxxxxxxxxx> wrote:

> Except serial console IO does not generate _any_ IRQ traffic - it
> purposely disables IRQs on the device before starting any IO to
> prevent any user-level IO interfering with the console output.

indeed - but it does generate _some_ IRQ traffic still:

  3:        251    IO-APIC-edge  serial

this is from a box that uses the serial line only for the kernel
console.

	Ingo
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