Hi, ******** This is an RFC, not for inclusion **********
This patchset introduces cpuidle infrastructure to POWER, prototyping for pSeries, and also does a major refactoring of current x86 idle power management and a cleanup of cpuidle infrastructure. My earlier iterations can be found at: v4 --> http://lkml.org/lkml/2009/9/1/133 v3 --> http://lkml.org/lkml/2009/8/27/124 v2 --> http://lkml.org/lkml/2009/8/26/233 v1 --> http://lkml.org/lkml/2009/8/19/150 Major Changes in this iteration: ------------------------------------------ * Refactoring x86 idle power management code Remove all instances of pm_idle and make cpuidle_idle_call as _the_ idle routine in x86. So, cpuidle_idle_call will be called from the main idle loop, cpu_idle instead of the function pointer pm_idle. Also, pm_idle was used by apm module and xen. Change those instances such that they register to cpuidle instead. * Cleanup drivers/cpuidle/cpuidle.c Currently, the cpuidle implementation has weakness in the framework where an exported pm_idle function pointer is manipulated by various subsystem. The proposed framework has a registration mechanism to cleanly add and remove new idle routines from different subsystems. * Implement cpuidle for pSeries Implement the processor_idle module for pseries, which registers idle loops to cpuidle and also cleanup arch/powerpc/platforms/pseries/setup.c and remove the redundant pseries_dedicated/shared_idle_sleep which is implemented in processor_idle.c Also, remove all instances of ppc_md.power_save, for the same reason as that given for pm_idle. TODO: --------------------------------------------- * Currently, the list based approach that I'm using here is not working in a clean way on a few x86 platforms which have multiple sleep states, leading to kernel panics. So working on resolving that. * ppc_md.power_save has been replaced by cpuidle_idle_call only for pseries. So this needs to be done for all POWER platforms so that ppc_md.power_save is completely removed. Patches included in this series: --------------------------------------------- 1/7 - cleanup drivers/cpuidle/cpuidle.c 2/7 - implement a list based approach to register a set of idle routines. 3/7 - refactor x86 idle power management code and remove all instances of pm_idle. 4/7 - enable cpuidle for POWER. 5/7 - remove dedicate/shared idle loops, which will be moved to arch/powerpc/platforms/pseries/processor_idle.c 6/7 - add a default_idle idle loop for POWER. 7/7 - implement pSeries processor idle module. Any comments on the design is welcome. --arun _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
