linux-kernel - Re: [LKP] 5404a7f1c2 [ 90.902541] watchdog: BUG: soft lockup

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Message-ID: <38ee8a35-1bb3-7a63-8ef6-75f0ff46d198@intel.com>
Date:   Wed, 19 Dec 2018 18:03:45 +0800
From:   Rong Chen <rong.a.chen@...el.com>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     linux-kernel@...r.kernel.org, LKP <lkp@...org>
Subject: Re: [LKP] 5404a7f1c2 [ 90.902541] watchdog: BUG: soft lockup - CPU#0
 stuck for 22s! [swapper:1]

On 12/18/2018 08:17 PM, Matthew Wilcox wrote:
> On Tue, Dec 18, 2018 at 08:20:28AM +0800, kernel test robot wrote:
>> Greetings,
>>
>> 0day kernel testing robot got the below dmesg and the first bad commit is
>>
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>>
>> commit 5404a7f1c21cfda061712bedf2d06cc0f6c755e9
> I feel like you're wasting my time.  This is the fourth time in a row
> you've reported something I can't reproduce.  At least this time the
> instructions work, but I've tried it a dozen times and it doesn't produce
> the error you're showing.
>
> $ git branch
> * (HEAD detached at 5404a7f1c21c)
> ...
> [    0.000000] Linux version 4.20.0-rc1-00012-g5404a7f1c21c (willy@...o) (gcc version 8.2.0 (Debian 8.2.0-9)) #4 Mon Dec 17 23:28:21 EST 2018
> ...
> [    9.848471] test_uuid: all 18 tests passed
> [   11.019267] XArray: 19496249 of 19496249 tests passed
>
> Your logs show it failing every time.  I can't help but wonder if it's
> something else in your setup that's causing it to fail -- maybe the
> machines doing the testing are overloaded?

Please accept my apologies for taking your time, it might be a false 
positive,
we have uploaded the original 
bzImage(https://download.01.org/0day-ci/lkp-qemu/fbc/5404a7f1c21cfda061712bedf2d06cc0f6c755e9/) 
for your reference.

Best Regards,
Rong Chen