linux-kernel - Re: [btrfs] 70d28b0e4f: BUG:kernel_reboot-without-warning_in_early-boot_stage,last_printk:Probing_EDD(edd=off_to

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Date:   Mon, 1 Apr 2019 23:02:37 +0800
From:   "Chen, Rong A" <rong.a.chen@...el.com>
To:     Qu Wenruo <wqu@...e.de>, Nikolay Borisov <nborisov@...e.com>
Cc:     lkp@...org, Stephen Rothwell <sfr@...b.auug.org.au>,
        Yoon Jungyeon <jungyeon@...ech.edu>,
        David Sterba <DSterba@...e.com>,
        Johannes Thumshirn <jthumshirn@...e.de>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [btrfs] 70d28b0e4f:
 BUG:kernel_reboot-without-warning_in_early-boot_stage,last_printk:Probing_EDD(edd=off_to_disable)...ok


On 4/1/2019 10:29 PM, Qu Wenruo wrote:
>
> On 2019/4/1 下午10:02,  Chen, Rong A  wrote:
>> On 4/1/2019 9:28 PM, Nikolay Borisov wrote:
>>> On 1.04.19 г. 16:24 ч., kernel test robot wrote:
>>>> FYI, we noticed the following commit (built with gcc-7):
>>>>
>>>> commit: 70d28b0e4f8ed2d38571e7b1f9bec7f321a53102 ("btrfs:
>>>> tree-checker: Verify dev item")
>>>> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
>>>>
>>>> in testcase: trinity
>>>> with following parameters:
>>>>
>>>>      runtime: 300s
>>>>
>>>> test-description: Trinity is a linux system call fuzz tester.
>>>> test-url: http://codemonkey.org.uk/projects/trinity/
>>>>
>>>>
>>>> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp
>>>> 2 -m 2G
>>>>
>>>> caused below changes (please refer to attached dmesg/kmsg for entire
>>>> log/backtrace):
>>>>
>>>>
>>>> +--------------------------------------------------------------------------------------------------------+------------+------------+
>>>>
>>>> |
>>>> | 36b9d2bc69 | 70d28b0e4f |
>>>> +--------------------------------------------------------------------------------------------------------+------------+------------+
>>>>
>>>> |
>>>> boot_successes
>>>> | 14         | 0          |
>>>> |
>>>> boot_failures
>>>> | 2          | 14         |
>>>> |
>>>> IP-Config:Auto-configuration_of_network_failed
>>>> | 2          |            |
>>>> |
>>>> BUG:kernel_reboot-without-warning_in_early-boot_stage,last_printk:Probing_EDD(edd=off_to_disable)...ok
>>>> | 0          | 14         |
>>>> +--------------------------------------------------------------------------------------------------------+------------+------------+
>>>>
>>>>
>>>>
>>>>
>>>> early console in setup code
>>>> Probing EDD (edd=off to disable)... ok
>>>> BUG: kernel reboot-without-warning in early-boot stage, last printk:
>>>> Probing EDD (edd=off to disable)... ok
>>>> Linux version 5.0.0-rc8-00196-g70d28b0 #1
>>>> Command line: ip=::::vm-snb-quantal-x86_64-1415::dhcp root=/dev/ram0
>>>> user=lkp
>>>> job=/lkp/jobs/scheduled/vm-snb-quantal-x86_64-1415/trinity-300s-quantal-core-x86_64-2018-11-09.cgz-70d28b0-20190330-29362-1y6g0qb-2.yaml
>>>> ARCH=x86_64 kconfig=x86_64-randconfig-s5-03231928
>>>> branch=linux-devel/devel-hourly-2019032317
>>>> commit=70d28b0e4f8ed2d38571e7b1f9bec7f321a53102
>>>> BOOT_IMAGE=/pkg/linux/x86_64-randconfig-s5-03231928/gcc-7/70d28b0e4f8ed2d38571e7b1f9bec7f321a53102/vmlinuz-5.0.0-rc8-00196-g70d28b0
>>>> max_uptime=1500
>>>> RESULT_ROOT=/result/trinity/300s/vm-snb-quantal-x86_64/quantal-core-x86_64-2018-11-09.cgz/x86_64-randconfig-s5-03231928/gcc-7/70d28b0e4f8ed2d38571e7b1f9bec7f321a53102/8
>>>> LKP_SERVER=inn debug apic=debug sysrq_always_enabled
>>>> rcupdate.rcu_cpu_stall_timeout=100 net.ifnames=0 printk.devkmsg=on
>>>> panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic
>>>> load_ramdisk=2 prompt_ramdisk=0 drbd.minor_count=8
>>>> systemd.log_level=err ignore_loglevel console=tty0
>>>> earlyprintk=ttyS0,115200 console=ttyS0,115200 vga=normal rw
>>>> rcuperf.shutdown=0
>>>>
>>> Can this report be made useful by actually including output from serial
>>> console? For example possible bug-ons or whatnot? dmesg.xz just contains
>>> qemu's command line + some metadata about the test and :
>>>
>>> "BUG: kernel reboot-without-warning in early-boot stage, last printk:
>>> Probing EDD (edd=off to disable)... ok"
>>>
>>> At least a stack trace would have been useful.
>>>
>>> <snip>
>>
>> Hi,
>>
>> We usually use the tool ("bin/lkp qemu -k <bzImage> job-script") to
>> reproduce it.  It seems no stack trace in the result:
> So there is no regression at that commit right?
>
> Just some false alert?


Hi,

I think there's a regression, it stopped in the early-boot stage .

Best Regards,
Rong Chen


> Thanks,
> Qu
>
>> $ lkp qemu -k vmlinuz-5.0.0-rc8-00196-g70d28b0 job-script
>> ...
>> Formatting '/tmp/vdisk-nfs/disk-vm-snb-quantal-x86_64-1415-0', fmt=qcow2
>> size=274877906944 cluster_size=65536 lazy_refcounts=off refcount_bits=16
>> Formatting '/tmp/vdisk-nfs/disk-vm-snb-quantal-x86_64-1415-1', fmt=qcow2
>> size=274877906944 cluster_size=65536 lazy_refcounts=off refcount_bits=16
>> exec command: qemu-system-x86_64 -enable-kvm -fsdev
>> local,id=test_dev,path=/home/nfs/.lkp//result/trinity/300s/vm-snb-quantal-x86_64/quantal-core-x86_64-2018-11-09.cgz/x86_64-randconfig-s5-03231928/gcc-7/70d28b0e4f8ed2d38571e7b1f9bec7f321a53102/2,security_model=none
>> -device virtio-9p-pci,fsdev=test_dev,mount_tag=9p/virtfs_mount -kernel
>> vmlinuz-5.0.0-rc8-00196-g70d28b0 -append root=/dev/ram0 user=lkp
>> job=/lkp/jobs/scheduled/vm-snb-quantal-x86_64-1415/trinity-300s-quantal-core-x86_64-2018-11-09.cgz-70d28b0-20190330-29362-1y6g0qb-2.yaml
>> ARCH=x86_64 kconfig=x86_64-randconfig-s5-03231928
>> branch=linux-devel/devel-hourly-2019032317
>> commit=70d28b0e4f8ed2d38571e7b1f9bec7f321a53102
>> BOOT_IMAGE=/pkg/linux/x86_64-randconfig-s5-03231928/gcc-7/70d28b0e4f8ed2d38571e7b1f9bec7f321a53102/vmlinuz-5.0.0-rc8-00196-g70d28b0
>> max_uptime=1500
>> RESULT_ROOT=/result/trinity/300s/vm-snb-quantal-x86_64/quantal-core-x86_64-2018-11-09.cgz/x86_64-randconfig-s5-03231928/gcc-7/70d28b0e4f8ed2d38571e7b1f9bec7f321a53102/8
>> LKP_LOCAL_RUN=1 debug apic=debug sysrq_always_enabled
>> rcupdate.rcu_cpu_stall_timeout=100 net.ifnames=0 printk.devkmsg=on
>> panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2
>> prompt_ramdisk=0 drbd.minor_count=8 systemd.log_level=err
>> ignore_loglevel console=tty0 earlyprintk=ttyS0,115200
>> console=ttyS0,115200 vga=normal rw ip=dhcp
>> result_service=9p/virtfs_mount -initrd /home/nfs/.lkp/cache/final_initrd
>> -smp 2 -m 2048M -no-reboot -watchdog i6300esb -rtc base=localtime
>> -device e1000,netdev=net0 -netdev user,id=net0 -display none -monitor
>> null -serial stdio -drive
>> file=/tmp/vdisk-nfs/disk-vm-snb-quantal-x86_64-1415-0,media=disk,if=virtio
>> -drive
>> file=/tmp/vdisk-nfs/disk-vm-snb-quantal-x86_64-1415-1,media=disk,if=virtio
>> early console in setup code
>> Probing EDD (edd=off to disable)... ok
>>
>> Best Regards,
>> Rong Chen
>>
>>