Recent Power Management Core Changes in Linux


One Line Summary

Overview of changes made to the Linux kernel's PM core over the last few releases


A number of significant changes have been made to the Linux kernel’s power management core in the last several months, including suspend-to-idle support, better integration of runtime PM with system suspend/resume, system suspend/resume optimizations and more. I will outline them and discuss the more important ones in more detail.


Linux kernel PM ACPI cpufreq cpuidle

Presentation Materials



  • Rjw

    Rafael Wysocki

    Intel OTC


    I am the maintainer of the Linux kernel’s core ACPI and power management code, including the core infrastructure for IO device PM, CPU PM and system suspend/hibernation. I work at Intel Open Source Technology Center as a Software Engineer with focus on the mainline Linux kernel. I’ve been actively contributing to Linux since 2005, in particular to the kernel’s suspend/hibernate subsystem, power management in general (IO runtime PM framework, PM QoS, wakeup framework etc.), hot-plug infrastructure, ACPI core and PCI core. Since 2008 I’ve given presentations at multiple Linux Foundation conferences and other Linux-related events, including the Linux Foundation Collaboration Summit, LinuxCon (North America/Japan/Europe), Linux Plumbers Conference,, LinuxTag, and Ottawa Linux Symposium. I hold a PhD (2002) in physics from the University of Warsaw, Poland.