Re: 2.6.8-rc3-mm2

Ingo Molnar
2004-08-10T13:23:24Z

* Russell King <rmk+lkml@arm.linux.org.uk> 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