Re: [patch] voluntary-preempt-184.108.40.206-P2
From: Ingo Molnar
Date: Mon Aug 16 2004 - 10:00:06 EST
* Thomas Charbonnel <thomas@xxxxxxxxxx> 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?
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