[$] Imbalance detection and fairness in the CPU scheduler

The kernel's CPU scheduler is good at distributing tasks across amultiprocessor system, but does it do so fairly? If some tasks get a lotmore CPU time than others, the result is likely to be unhappy users.Vincent Guittot ran a session at the 2020 Power Management and Schedulingin the Linux Kernel summit (OSPM) looking into this issue, with a focuson detecting load imbalances between CPUs and what to do with a workloadthat cannot be balanced.