OTP-16371
Taking a scheduler offline could cause timers set while executing on
that scheduler to be delayed until the scheduler was put online again.
This bug was introduced in ERTS version 10.0 (OTP 21.0).
OTP-16378 | ERL-1125
The ets:update_counter/4 core dumped when given an ordered_set with
write_concurrency enabled and an invalid position.
OTP-16379
A process calling erlang:system_flag(multi_scheduling, block) could end
up blocked waiting for the operation to complete indefinitely.
Reviewed by: olgeni
MFH: 2020Q1
Sponsored by: SkunkWerks, GmbH
Differential Revision: https://reviews.freebsd.org/D23313
6fbfd7b161