Re: [LKP] 5404a7f1c2 [ 90.902541] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapper:1]

From: Rong Chen
Date: Wed Dec 19 2018 - 05:03:36 EST

On 12/18/2018 08:17 PM, Matthew Wilcox wrote:
On Tue, Dec 18, 2018 at 08:20:28AM +0800, kernel test robot wrote:

0day kernel testing robot got the below dmesg and the first bad commit is 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@bobo) (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( for your reference.

Best Regards,
Rong Chen