[$] Reports from OSPM 2026, day one

The Power Managementand Scheduling in the Linux Kernel Summit, which still goes by thehistorical acronym OSPM, was held in Cambridge, UK, in mid-April. As hasbecome traditional, the presenters at that event have since writtensummaries of their sessions, and this work has kindly been made availableto LWN for publication. The first day's sessions covered a wide range oftopics, including idle-state selection, user-space schedulers withsched_ext, lock-holder preemption, and much more.