Users of various Linux distributions using the BFQ I/O scheduler encountered a problem after upgrading the Linux kernel to version 5.14.7, leading to kernel crashes within hours of booting. The issue also persists in kernel 5.14.8. This was caused by a regressive change brought over from the testing branch 5.15 in the BFQ (Budget Fair Queueing) I/O scheduler, which has only been addressed in the form of a patch.
As a workaround to resolve the issue, you can switch the scheduler to mq-deadline. For example, for the device nvme0n1: echo mq-deadline > /sys/block/nvme0n1/queue/scheduler
Source: opennet.ru
