FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 82607adcf9cdf40fb7b5331269780c8f70ec6e35 ("workqueue: implement lockup detector")


[   75.684302] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[   88.791869] ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
[   88.795120] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
[   90.789792] BUG: workqueue lockup - pool cpus=0 flags=0x4 nice=0 stuck for 42s!
[   90.794158] Showing busy workqueues and worker pools:
[   90.796507] workqueue cgroup_pidlist_destroy: flags=0x0
[   90.798976]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1





Thanks,
Kernel Test Robot