linux-kernel - Re: [lkp-robot] [init, tracing] 2580d6b795: BUG:kernel_reboot-without-warning_in_boot

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Date:   Mon, 9 Apr 2018 18:04:54 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     kernel test robot <xiaolong.ye@...el.com>
Cc:     linux-kernel@...r.kernel.org, lkp@...org
Subject: Re: [lkp-robot] [init, tracing]  2580d6b795:
 BUG:kernel_reboot-without-warning_in_boot_stage

On Mon, 9 Apr 2018 13:32:52 +0800
kernel test robot <xiaolong.ye@...el.com> wrote:

> FYI, we noticed the following commit (built with gcc-7):
> 
> commit: 2580d6b795e25879c825a0891cf67390f665b11f ("init, tracing: Have printk come through the trace events for initcall_debug")
> url: https://github.com/0day-ci/linux/commits/Steven-Rostedt/init-tracing/20180407-130743
> 
> 
> in testcase: boot
> 
> on test machine: qemu-system-x86_64 -enable-kvm -cpu Nehalem -smp 2 -m 512M
> 
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
> 
> 
> +------------------------------------------------------------------+------------+------------+
> |                                                                  | ecf6709d07 | 2580d6b795 |
> +------------------------------------------------------------------+------------+------------+
> | boot_successes                                                   | 0          | 0          |
> | boot_failures                                                    | 8          | 8          |
> | invoked_oom-killer:gfp_mask=0x                                   | 8          |            |
> | Mem-Info                                                         | 8          |            |
> | Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 8          |            |
> | BUG:kernel_reboot-without-warning_in_boot_stage                  | 0          | 8          |
> +------------------------------------------------------------------+------------+------------+

What does this mean?

> 
> 
> 
> [    0.000000] RAMDISK: [mem 0x1b7e2000-0x1ffcffff]
> [    0.000000] ACPI: Early table checksum verification disabled
> [    0.000000] ACPI: RSDP 0x00000000000F6860 000014 (v00 BOCHS )
> [    0.000000] ACPI: RSDT 0x000000001FFE1628 000030 (v01 BOCHS  BXPCRSDT 00000001 BXPC 00000001)
> [    0.000000] ACPI: FACP 0x000000001FFE147C 000074 (v01 BOCHS  BXPCFACP 00000001 BXPC 00000001)
> BUG: kernel reboot-without-warning in boot stage
> 
> Elapsed time: 10
> 
> #!/bin/bash
> 
> 
> 
> To reproduce:
> 
>         git clone https://github.com/intel/lkp-tests.git
>         cd lkp-tests
>         bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email
> 

The config boots fine for me. But I don't have the setup to run the
above and get it to work, nor the time to figure out why it doesn't
work.

-- Steve