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Groups > linux.debian.bugs.dist > #1262759

Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0

From Thomas Gleixner <tglx@linutronix.de>
Newsgroups linux.debian.bugs.dist, linux.kernel, linux.debian.kernel
Subject Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0
Date 2025-09-23 12:40 +0200
Message-ID <Ly8Bb-hxUe-3@gated-at.bofh.it> (permalink)
References <LwibD-gg1L-3@gated-at.bofh.it> <LwiOl-ggwT-1@gated-at.bofh.it> <LxSG5-hmA3-1@gated-at.bofh.it> <Ljo5b-7khn-1@gated-at.bofh.it> <LxSG5-hmA3-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

Cross-posted to 3 groups.

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On Mon, Sep 22 2025 at 19:33, Thorsten Sperber wrote:
>
> thanks for your help. It's been four days now, I'd say above average
> (last was five days) - and no crash yet. I'm going to wait at least
> until the weekend before naming a winner, but that's already looking
> pretty good.

Thanks for trying.

I suggested to try intel_idle.max_cstate=2 because these unknown NMI
backtraces all originated from a MWAIT(C3).

Can you reboot into the working 6.1.y kernel at some point and check
which idle driver is used there?

    cat /sys/devices/system/cpu/cpuidle/current_driver

and which states are advertised:

    ls /sys/devices/system/cpu/cpu0/cpuidle/state

Thanks,

        tglx

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Thread

Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2025-09-18 10:30 +0200
  Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2025-09-18 11:10 +0200
    Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thorsten Sperber <lists+debian@aero2k.de> - 2025-09-22 19:40 +0200
      Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thomas Gleixner <tglx@linutronix.de> - 2025-09-23 12:40 +0200
        Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thorsten Sperber <lists+debian@aero2k.de> - 2025-09-24 19:30 +0200
          Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thomas Gleixner <tglx@linutronix.de> - 2025-09-25 00:20 +0200
            Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thorsten Sperber <lists+debian@aero2k.de> - 2025-09-25 17:30 +0200

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