kernel-rt: scheduling while in atomic on early boot
Issue
A newly installed kernel-rt can not boot, freezing on early boot with messages about scheduling while in atomic for filesystem/block device process. For example, fsck, mount or block device's kworkers.
Environment
Red Hat Enterprise MRG for Realtime (MRG-RT)
- kernel-rt-3.10.0-327.rt56.170.el6rt
Red Hat Enterprise Linux for Real Time (RHEL-RT)
- kernel-rt-3.10.0-327.rt56.204.el7
- kernel-rt-3.10.0-327.4.5.rt56.206.el7_2
Multiqueue block devices, like /dev/nvme*
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