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Message-ID: <4a55b5c7-093b-4246-88ed-5d83da1973ed@aero2k.de> Date: Thu, 25 Sep 2025 17:27:19 +0200 From: Thorsten Sperber <lists+debian@...o2k.de> To: Thomas Gleixner <tglx@...utronix.de>, Uwe Kleine-König <u.kleine-koenig@...libre.com> Cc: 1111027@...s.debian.org, "Rafael J. Wysocki" <rafael@...nel.org>, linux-kernel@...r.kernel.org Subject: Re: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 On 9/25/25 00:10, Thomas Gleixner wrote: >> # cat /proc/cmdline >> BOOT_IMAGE=/vmlinuz-6.1.0-40-amd64 root=/dev/mapper/thecube--vg-root ro quiet intel_iommu=off intel_idle.max_cstate=2 >> >> # cat /sys/devices/system/cpu/cpuidle/current_driver >> intel_idle >> >> # ls -l /sys/devices/system/cpu/cpu0/cpuidle/ >> insgesamt 0 >> drwxr-xr-x 2 root root 0 24. Sep 19:14 state0 >> drwxr-xr-x 3 root root 0 24. Sep 19:14 state1 >> drwxr-xr-x 3 root root 0 24. Sep 19:14 state2 >> >> # cat /sys/devices/system/cpu/cpu0/cpuidle/state*/name >> POLL >> C1 >> C1E > What's the output for the above on 6.12? > All the same (apart from the cmdline of course). Btw, error appeared in the morning (without intel_iommu=off), still without halting/crashing the system. Bugs me a little that I can't exactly reproduce the "crash to coldstart" situation again. Just in case someone sees something new: # cat /proc/cmdline BOOT_IMAGE=/vmlinuz-6.12.43+deb13-amd64 root=/dev/mapper/thecube--vg-root ro quiet intel_idle.max_cstate=2 [Do Sep 25 07:15:50 2025] NMI: IOCK error (debug interrupt?) for reason 61 on CPU 0. [Do Sep 25 07:15:50 2025] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.43+deb13-amd64 #1 Debian 6.12.43-1 [Do Sep 25 07:15:50 2025] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 04/04/2019 [Do Sep 25 07:15:50 2025] RIP: 0010:intel_idle+0x55/0x90 [Do Sep 25 07:15:50 2025] Code: 2d 5c 8c 40 00 eb 47 cc cc cc 48 89 f0 0f 1f 00 31 c9 48 89 ca 0f 01 c8 48 8b 06 a8 08 75 0b b9 01 00 00 00 4c 89 c0 0f 01 c9 <f0> 80 66 02 df f0 83 44 24 fc 00 48 8b 06 a8 08 74 0b 65 81 25 a6 [Do Sep 25 07:15:50 2025] RSP: 0018:ffffffff97203e38 EFLAGS: 00000046 [Do Sep 25 07:15:50 2025] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001 [Do Sep 25 07:15:50 2025] RDX: 0000000000000000 RSI: ffffffff97210940 RDI: 0000000000000002 [Do Sep 25 07:15:50 2025] RBP: ffff9a5b416400c0 R08: 0000000000000001 R09: 000000000001e83e [Do Sep 25 07:15:50 2025] R10: ffff9a5b416347a4 R11: 071c71c71c71c71c R12: ffffffff973b70c0 [Do Sep 25 07:15:50 2025] R13: ffffffff973b71a8 R14: 0000000000000002 R15: 0000000000000000 [Do Sep 25 07:15:50 2025] FS: 0000000000000000(0000) GS:ffff9a5b41600000(0000) knlGS:0000000000000000 [Do Sep 25 07:15:50 2025] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [Do Sep 25 07:15:50 2025] CR2: 00007ffe16efe098 CR3: 0000000103a60005 CR4: 00000000001726f0 [Do Sep 25 07:15:50 2025] Call Trace: [Do Sep 25 07:15:50 2025] <TASK> [Do Sep 25 07:15:50 2025] cpuidle_enter_state+0x81/0x420 [Do Sep 25 07:15:50 2025] cpuidle_enter+0x2d/0x40 [Do Sep 25 07:15:50 2025] do_idle+0x1e5/0x240 [Do Sep 25 07:15:50 2025] cpu_startup_entry+0x29/0x30 [Do Sep 25 07:15:50 2025] rest_init+0xcc/0xd0 [Do Sep 25 07:15:50 2025] start_kernel+0x74c/0x750 [Do Sep 25 07:15:50 2025] x86_64_start_reservations+0x24/0x30 [Do Sep 25 07:15:50 2025] x86_64_start_kernel+0x95/0xa0 [Do Sep 25 07:15:50 2025] common_startup_64+0x13e/0x141 [Do Sep 25 07:15:50 2025] </TASK> [Do Sep 25 07:15:52 2025] NMI: IOCK error (debug interrupt?) for reason 61 on CPU 0. [Do Sep 25 07:15:52 2025] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.43+deb13-amd64 #1 Debian 6.12.43-1 [Do Sep 25 07:15:52 2025] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 04/04/2019 [Do Sep 25 07:15:52 2025] RIP: 0010:intel_idle+0x55/0x90 [Do Sep 25 07:15:52 2025] Code: 2d 5c 8c 40 00 eb 47 cc cc cc 48 89 f0 0f 1f 00 31 c9 48 89 ca 0f 01 c8 48 8b 06 a8 08 75 0b b9 01 00 00 00 4c 89 c0 0f 01 c9 <f0> 80 66 02 df f0 83 44 24 fc 00 48 8b 06 a8 08 74 0b 65 81 25 a6 [Do Sep 25 07:15:52 2025] RSP: 0018:ffffffff97203e38 EFLAGS: 00000046 [Do Sep 25 07:15:52 2025] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001 [Do Sep 25 07:15:52 2025] RDX: 0000000000000000 RSI: ffffffff97210940 RDI: 0000000000000002 [Do Sep 25 07:15:52 2025] RBP: ffff9a5b416400c0 R08: 0000000000000001 R09: 000000000001e83e [Do Sep 25 07:15:52 2025] R10: ffff9a5b416347a4 R11: 071c71c71c71c71c R12: ffffffff973b70c0 [Do Sep 25 07:15:52 2025] R13: ffffffff973b71a8 R14: 0000000000000002 R15: 0000000000000000 [Do Sep 25 07:15:52 2025] FS: 0000000000000000(0000) GS:ffff9a5b41600000(0000) knlGS:0000000000000000 [Do Sep 25 07:15:52 2025] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [Do Sep 25 07:15:52 2025] CR2: 00007ffe16efe098 CR3: 0000000103a60005 CR4: 00000000001726f0 [Do Sep 25 07:15:52 2025] Call Trace: [Do Sep 25 07:15:52 2025] <TASK> [Do Sep 25 07:15:52 2025] cpuidle_enter_state+0x81/0x420 [Do Sep 25 07:15:52 2025] cpuidle_enter+0x2d/0x40 [Do Sep 25 07:15:52 2025] do_idle+0x1e5/0x240 [Do Sep 25 07:15:52 2025] cpu_startup_entry+0x29/0x30 [Do Sep 25 07:15:52 2025] rest_init+0xcc/0xd0 [Do Sep 25 07:15:52 2025] start_kernel+0x74c/0x750 [Do Sep 25 07:15:52 2025] x86_64_start_reservations+0x24/0x30 [Do Sep 25 07:15:52 2025] x86_64_start_kernel+0x95/0xa0 [Do Sep 25 07:15:52 2025] common_startup_64+0x13e/0x141 [Do Sep 25 07:15:52 2025] </TASK> [Do Sep 25 07:15:54 2025] NMI: IOCK error (debug interrupt?) for reason 61 on CPU 0. [Do Sep 25 07:15:54 2025] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.43+deb13-amd64 #1 Debian 6.12.43-1 [Do Sep 25 07:15:54 2025] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 04/04/2019 [Do Sep 25 07:15:54 2025] RIP: 0010:intel_idle+0x55/0x90 [Do Sep 25 07:15:54 2025] Code: 2d 5c 8c 40 00 eb 47 cc cc cc 48 89 f0 0f 1f 00 31 c9 48 89 ca 0f 01 c8 48 8b 06 a8 08 75 0b b9 01 00 00 00 4c 89 c0 0f 01 c9 <f0> 80 66 02 df f0 83 44 24 fc 00 48 8b 06 a8 08 74 0b 65 81 25 a6 [Do Sep 25 07:15:54 2025] RSP: 0018:ffffffff97203e38 EFLAGS: 00000046 [Do Sep 25 07:15:54 2025] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001 [Do Sep 25 07:15:54 2025] RDX: 0000000000000000 RSI: ffffffff97210940 RDI: 0000000000000002 [Do Sep 25 07:15:54 2025] RBP: ffff9a5b416400c0 R08: 0000000000000001 R09: 000000000001e83e [Do Sep 25 07:15:54 2025] R10: ffff9a5b416347a4 R11: 071c71c71c71c71c R12: ffffffff973b70c0 [Do Sep 25 07:15:54 2025] R13: ffffffff973b71a8 R14: 0000000000000002 R15: 0000000000000000 [Do Sep 25 07:15:54 2025] FS: 0000000000000000(0000) GS:ffff9a5b41600000(0000) knlGS:0000000000000000 [Do Sep 25 07:15:54 2025] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [Do Sep 25 07:15:54 2025] CR2: 00007ffe16efe098 CR3: 0000000103a60005 CR4: 00000000001726f0 [Do Sep 25 07:15:54 2025] Call Trace: [Do Sep 25 07:15:54 2025] <TASK> [Do Sep 25 07:15:54 2025] cpuidle_enter_state+0x81/0x420 [Do Sep 25 07:15:54 2025] cpuidle_enter+0x2d/0x40 [Do Sep 25 07:15:54 2025] do_idle+0x1e5/0x240 [Do Sep 25 07:15:54 2025] cpu_startup_entry+0x29/0x30 [Do Sep 25 07:15:54 2025] rest_init+0xcc/0xd0 [Do Sep 25 07:15:54 2025] start_kernel+0x74c/0x750 [Do Sep 25 07:15:54 2025] x86_64_start_reservations+0x24/0x30 [Do Sep 25 07:15:54 2025] x86_64_start_kernel+0x95/0xa0 [Do Sep 25 07:15:54 2025] common_startup_64+0x13e/0x141 [Do Sep 25 07:15:54 2025] </TASK> [Do Sep 25 07:15:56 2025] NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0. [Do Sep 25 07:15:56 2025] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.43+deb13-amd64 #1 Debian 6.12.43-1 [Do Sep 25 07:15:56 2025] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 04/04/2019 [Do Sep 25 07:15:56 2025] RIP: 0010:intel_idle+0x55/0x90 [Do Sep 25 07:15:56 2025] Code: 2d 5c 8c 40 00 eb 47 cc cc cc 48 89 f0 0f 1f 00 31 c9 48 89 ca 0f 01 c8 48 8b 06 a8 08 75 0b b9 01 00 00 00 4c 89 c0 0f 01 c9 <f0> 80 66 02 df f0 83 44 24 fc 00 48 8b 06 a8 08 74 0b 65 81 25 a6 [Do Sep 25 07:15:56 2025] RSP: 0018:ffffffff97203e38 EFLAGS: 00000046 [Do Sep 25 07:15:56 2025] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001 [Do Sep 25 07:15:56 2025] RDX: 0000000000000000 RSI: ffffffff97210940 RDI: 0000000000000002 [Do Sep 25 07:15:56 2025] RBP: ffff9a5b416400c0 R08: 0000000000000001 R09: 000000000001e83e [Do Sep 25 07:15:56 2025] R10: ffff9a5b416347a4 R11: 071c71c71c71c71c R12: ffffffff973b70c0 [Do Sep 25 07:15:56 2025] R13: ffffffff973b71a8 R14: 0000000000000002 R15: 0000000000000000 [Do Sep 25 07:15:56 2025] FS: 0000000000000000(0000) GS:ffff9a5b41600000(0000) knlGS:0000000000000000 [Do Sep 25 07:15:56 2025] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [Do Sep 25 07:15:56 2025] CR2: 00007ffe16efe098 CR3: 0000000103a60005 CR4: 00000000001726f0 [Do Sep 25 07:15:56 2025] Call Trace: [Do Sep 25 07:15:56 2025] <TASK> [Do Sep 25 07:15:56 2025] cpuidle_enter_state+0x81/0x420 [Do Sep 25 07:15:56 2025] cpuidle_enter+0x2d/0x40 [Do Sep 25 07:15:56 2025] do_idle+0x1e5/0x240 [Do Sep 25 07:15:56 2025] cpu_startup_entry+0x29/0x30 [Do Sep 25 07:15:56 2025] rest_init+0xcc/0xd0 [Do Sep 25 07:15:56 2025] start_kernel+0x74c/0x750 [Do Sep 25 07:15:56 2025] x86_64_start_reservations+0x24/0x30 [Do Sep 25 07:15:56 2025] x86_64_start_kernel+0x95/0xa0 [Do Sep 25 07:15:56 2025] common_startup_64+0x13e/0x141 [Do Sep 25 07:15:56 2025] </TASK> [Do Sep 25 07:15:58 2025] NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0. [Do Sep 25 07:15:58 2025] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.43+deb13-amd64 #1 Debian 6.12.43-1 [Do Sep 25 07:15:58 2025] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 04/04/2019 [Do Sep 25 07:15:58 2025] RIP: 0010:intel_idle+0x55/0x90 [Do Sep 25 07:15:58 2025] Code: 2d 5c 8c 40 00 eb 47 cc cc cc 48 89 f0 0f 1f 00 31 c9 48 89 ca 0f 01 c8 48 8b 06 a8 08 75 0b b9 01 00 00 00 4c 89 c0 0f 01 c9 <f0> 80 66 02 df f0 83 44 24 fc 00 48 8b 06 a8 08 74 0b 65 81 25 a6 [Do Sep 25 07:15:58 2025] RSP: 0018:ffffffff97203e38 EFLAGS: 00000046 [Do Sep 25 07:15:58 2025] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001 [Do Sep 25 07:15:58 2025] RDX: 0000000000000000 RSI: ffffffff97210940 RDI: 0000000000000002 [Do Sep 25 07:15:58 2025] RBP: ffff9a5b416400c0 R08: 0000000000000001 R09: 000000000001e83e [Do Sep 25 07:15:58 2025] R10: ffff9a5b416347a4 R11: 071c71c71c71c71c R12: ffffffff973b70c0 [Do Sep 25 07:15:58 2025] R13: ffffffff973b71a8 R14: 0000000000000002 R15: 0000000000000000 [Do Sep 25 07:15:58 2025] FS: 0000000000000000(0000) GS:ffff9a5b41600000(0000) knlGS:0000000000000000 [Do Sep 25 07:15:58 2025] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [Do Sep 25 07:15:58 2025] CR2: 00007ffe16efe098 CR3: 0000000103a60005 CR4: 00000000001726f0 [Do Sep 25 07:15:58 2025] Call Trace: [Do Sep 25 07:15:58 2025] <TASK> [Do Sep 25 07:15:58 2025] cpuidle_enter_state+0x81/0x420 [Do Sep 25 07:15:58 2025] cpuidle_enter+0x2d/0x40 [Do Sep 25 07:15:58 2025] do_idle+0x1e5/0x240 [Do Sep 25 07:15:58 2025] cpu_startup_entry+0x29/0x30 [Do Sep 25 07:15:58 2025] rest_init+0xcc/0xd0 [Do Sep 25 07:15:58 2025] start_kernel+0x74c/0x750 [Do Sep 25 07:15:58 2025] x86_64_start_reservations+0x24/0x30 [Do Sep 25 07:15:58 2025] x86_64_start_kernel+0x95/0xa0 [Do Sep 25 07:15:58 2025] common_startup_64+0x13e/0x141 [Do Sep 25 07:15:58 2025] </TASK> [Do Sep 25 07:16:00 2025] clocksource: Long readout interval, skipping watchdog check: cs_nsec: 7623994708 wd_nsec: 7623993107 Guess I'll remove all customization next. Best regards, Thorsten
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