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Message-ID: <CA+G9fYsdQ58YL96Kv7dY1nb5Ok3=o7L68JdpOH4yZJ_3nAdExw@mail.gmail.com>
Date: Mon, 22 Jul 2024 19:59:56 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: open list <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org, 
	Linux Regressions <regressions@...ts.linux.dev>
Cc: Anna-Maria Behnsen <anna-maria@...utronix.de>, Thomas Gleixner <tglx@...utronix.de>, 
	Frederic Weisbecker <frederic@...nel.org>, Arnd Bergmann <arnd@...db.de>, 
	Anders Roxell <anders.roxell@...aro.org>, Peter Zijlstra <peterz@...radead.org>, 
	Dan Carpenter <dan.carpenter@...aro.org>
Subject: WARNING: at kernel/time/timer_migration.c:1714 tmigr_cpu_prepare

The following boot warnings noticed on all the devices running today's
Linux next-20240722 tag. The system is stable and booted to console.

First seen on next-20240722.

  GOOD: next-20240719
  BAD: next-20240722

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

Boot log:
-----------
[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x517f803c]
[    0.000000] Linux version 6.10.0-next-20240722 (tuxmake@...make)
(aarch64-linux-gnu-gcc (Debian 13.2.0-12) 13.2.0, GNU ld (GNU Binutils
for Debian) 2.42) #1 SMP PREEMPT @1721630963
[    0.000000] KASLR enabled
[    0.000000] Machine model: Thundercomm Dragonboard 845c
...
[    0.007393] rcu: Max phase no-delay instances is 1000.
[    0.007773] Timer migration: 1 hierarchy levels; 8 children per
group; 1 crossnode level
[    0.007823] ------------[ cut here ]------------
[    0.007833] WARNING: CPU: 0 PID: 1 at
kernel/time/timer_migration.c:1714 tmigr_cpu_prepare
(kernel/time/timer_migration.c:1714 (discriminator 1))
[    0.007858] Modules linked in:
[    0.007870] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted
6.10.0-next-20240722 #1
[    0.007878] Hardware name: Thundercomm Dragonboard 845c (DT)
[    0.007883] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[    0.007890] pc : tmigr_cpu_prepare
(kernel/time/timer_migration.c:1714 (discriminator 1))
[    0.007896] lr : cpuhp_invoke_callback (kernel/cpu.c:194)
[    0.007907] sp : ffff80008005bb20
[    0.007910] x29: ffff80008005bbb0 x28: ffffa8983a9defd0 x27: ffff422c792f74f8
[    0.007920] x26: ffff99943f4ea000 x25: ffff422c792f2c68 x24: ffffa8983a9e35c0
[    0.007928] x23: ffffa898379aa798 x22: 0000000000000000 x21: ffffa89839e08c68
[    0.007936] x20: ffffa89839e0d000 x19: 0000000000000000 x18: 0000000000000006
[    0.007943] x17: 6f72632031203b70 x16: 756f726720726570 x15: 0720072007200720
[    0.007951] x14: 0720072007200720 x13: 0720072007200720 x12: 0720072007200720
[    0.007959] x11: 0720072007200720 x10: ffffa8983aa5df30 x9 : ffffa898378b2a88
[    0.007967] x8 : 00000000ffffefff x7 : ffffa8983aa5df30 x6 : 0000000000000001
[    0.007975] x5 : 0000000000000000 x4 : ffffa89839e0d4f8 x3 : ffff99943f4ea000
[    0.007982] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffffa89839e0d4f8
[    0.007990] Call trace:
[    0.007993] tmigr_cpu_prepare (kernel/time/timer_migration.c:1714
(discriminator 1))
[    0.007998] cpuhp_invoke_callback (kernel/cpu.c:194)
[    0.008004] cpuhp_issue_call (kernel/cpu.c:2359 kernel/cpu.c:2339)
[    0.008011] __cpuhp_setup_state_cpuslocked (kernel/cpu.c:2505)
[    0.008021] __cpuhp_setup_state (kernel/cpu.c:2534)
[    0.008027] tmigr_init (include/linux/cpuhotplug.h:277
kernel/time/timer_migration.c:1794)
[    0.008040] do_one_initcall (init/main.c:1267)
[    0.008049] kernel_init_freeable (init/main.c:1372 (discriminator
1) init/main.c:1567 (discriminator 1))
[    0.008057] kernel_init (init/main.c:1471)
[    0.008068] ret_from_fork (arch/arm64/kernel/entry.S:861)
[    0.008076] ---[ end trace 0000000000000000 ]---


metadata:
-----
  artifact-location:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2jagYnqJwwRb1upwVgqd6h6cQoU/
  build-url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2jagYnqJwwRb1upwVgqd6h6cQoU/
  build_name: gcc-13-lkftconfig-debug
  git_describe: next-20240722
  git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
  git_sha: dee7f101b64219f512bb2f842227bd04c14efe30
  kernel-config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2jagYnqJwwRb1upwVgqd6h6cQoU/config
  toolchain: gcc-13

Steps to reproduce:
-------
 - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2jagaCWDNIYL1r8qprPP81YQdaF/reproducer


Full dmesg link:
--------
 - https://lkft.validation.linaro.org/scheduler/job/7753578#L5022
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240722/testrun/24669141/suite/log-parser-boot/test/check-kernel-exception-a189d92b895bd0de96c24e2d262e9caa627c25600bb7fda7c5894f2ce03ebb57/log

--
Linaro LKFT
https://lkft.linaro.org

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