dad4f140ed ("Merge branch 'xarray' of .."): Mem-Info:

[Matthew Wilcox]

On Sat, Nov 24, 2018 at 09:20:38AM +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 dad4f140edaa3f6bb452b6913d41af1ffd672e45

I think you've got the wrong bisection point, confused by other messages.
Here's the messages I think you intend to chase:

[  155.389297] BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck
 for 52s!
[  155.409004] BUG: workqueue lockup - pool cpus=0 flags=0x4 nice=0 stuck for 40
s!
[  155.420377] Showing busy workqueues and worker pools:
[  155.428445] workqueue events: flags=0x0
[  155.434634]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
[  155.437904]     pending: cache_reap
[  155.449671] workqueue events_power_efficient: flags=0x82
[  155.458000]   pwq 2: cpus=0 flags=0x4 nice=0 active=3/256
[  155.461269]     pending: neigh_periodic_work, do_cache_clean, check_lifetime


but you're getting hung up on the testsuite problems.