Re: [patch] voluntary-preempt-2.6.8.1-P2

Ingo Molnar
2004-08-16T14:57:58Z

* Thomas Charbonnel <thomas@undata.org> wrote:

> 0.000ms (+0.000ms): do_IRQ (default_idle)
> 0.000ms (+0.000ms): mask_and_ack_8259A (do_IRQ)
> 0.459ms (+0.459ms): generic_redirect_hardirq (do_IRQ)
> 0.459ms (+0.000ms): generic_handle_IRQ_event (do_IRQ)
> 0.459ms (+0.000ms): timer_interrupt (generic_handle_IRQ_event)

> It definitely looks like the kernel is interrupted by some interrupt
> source not covered by the patch.

the only possibility is SMM, which is not handled by Linux. (but by the
BIOS.) Otherwise we track everything - including NMIs.

can you reproduce this using an UP kernel too?

Ingo