Scheduler late arriving fixes for 9.1
Bugzilla: https://bugzilla.redhat.com/2078906
Tested: Ran scheduler stress, load balancing and nohz tests.
Series of fixes from the last stages of v5.18 to catch
a few updates to code already pulled back into el9.
Signed-off-by: Phil Auld pauld@redhat.com
Edited by Phil Auld