[$] Reports from OSPM 2025, day two

The seventh edition of the Power Management and Scheduling
in the Linux Kernel Summit (known as 'OSPM') took place on March 18-20,
2025. Topics discussed on the second day include improvements to device
suspend and resume, the status and future of sched_ext, the scx_lavd
scheduler, improving the efficiency of load balancing, and hierarchical
constant bandwidth server scheduling.