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Explore the ongoing development of multiple system-wide low power-states support in the Linux kernel through this 25-minute conference talk from the Linux Plumbers Conference. Learn about the latest progress since the Vienna LPC, including a proposed user-space interface that allows specification of system-wakeup latency constraints. Discover how these latency constraints can be integrated during s2idle operations, particularly regarding CPU and CPU-cluster wakeup-latencies for low-power states. Gain insights into the technical challenges and proposed solutions for implementing multiple power states, examine the current patch series and implementation approaches, and participate in discussions about the future direction of this critical kernel functionality. Understand the implications for system power management, performance optimization, and the balance between power savings and responsiveness in modern Linux systems.
