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sched: Persistent user requested cpu affinity

Waiman Long requested to merge llong1/centos-stream-9:bz2107354_affinity into main

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2107354
Upstream Status: tip/sched/core branch
MR: !1544 (merged)
Tested: A reproducer listed in the BZ is used to verify that the problem is gone with new kernel.

This MR backports upstream commits that implement persistent user requested cpu affinity that won't be affected or minimally affected by changes in cpuset and other hotplug activities.

Signed-off-by: Waiman Long longman@redhat.com

Edited by Waiman Long

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