Hi all, Based on our investigation in the area of the MIPS scheduler context switch we wish to share our learnings about the kernel scheduler in the form of kernel documentation. Investigations were done mostly by stepping through the code using GDB and code inspection. The aim of the patchset is to provide a brief overview of the kernel scheduler starting from a brief history, the overview of the kernel structs used by the scheduler, scheduler invocation and context switch. We have also added a small section on scheduler state modelling possibilities. In order to add these subjects we have restructured the existing scheduler documentation so as to put them in to suitable sections. We hope the new structure will enable easy extension of the scheduler documentation. Patch 1 creates place holders and new structure for the scheduler documentation. The main sections are - Scheduler overview: Overview of the scheduler. - CFS: A section dedicated to CFS scheduler. - Process context switching: Context switching overview. - Scheduler features: We thought most of the existing documentation can be moved here. - Architecture Specific Scheduler Implementation Differences: Aimed for each architecture and future updates. - Scheduler Debugging Interface: For scheduler diagnostics and utilities - Scheduler related functions: Scheduler API reference. Patch 2: Adds documentation for the place holders of the Scheduler overview, Scheduler State Transition and CFS sections. Patch 3: Adds documentation for the place holder of the Process context switching and add 2 new sections to for x86 and MIPS context switch. John Mathew (3): docs: scheduler: Restructure scheduler documentation. docs: scheduler: Add scheduler overview documentation docs: scheduler: Add introduction to scheduler context-switch Documentation/scheduler/arch-specific.rst | 14 + Documentation/scheduler/cfs-data-structs.rst | 208 ++++++++++++++ Documentation/scheduler/cfs-overview.rst | 46 ++++ .../scheduler/cfs-sched-overview.rst | 17 ++ Documentation/scheduler/context-switching.rst | 71 +++++ Documentation/scheduler/index.rst | 31 ++- .../scheduler/mips-context-switch.rst | 78 ++++++ Documentation/scheduler/overview.rst | 260 ++++++++++++++++++ Documentation/scheduler/sched-debugging.rst | 14 + Documentation/scheduler/sched-features.rst | 20 ++ Documentation/scheduler/scheduler-api.rst | 34 +++ .../scheduler/x86-context-switch.rst | 59 ++++ kernel/sched/core.c | 36 ++- 13 files changed, 867 insertions(+), 21 deletions(-) create mode 100644 Documentation/scheduler/arch-specific.rst create mode 100644 Documentation/scheduler/cfs-data-structs.rst create mode 100644 Documentation/scheduler/cfs-overview.rst create mode 100644 Documentation/scheduler/cfs-sched-overview.rst create mode 100644 Documentation/scheduler/context-switching.rst create mode 100644 Documentation/scheduler/mips-context-switch.rst create mode 100644 Documentation/scheduler/overview.rst create mode 100644 Documentation/scheduler/sched-debugging.rst create mode 100644 Documentation/scheduler/sched-features.rst create mode 100644 Documentation/scheduler/scheduler-api.rst create mode 100644 Documentation/scheduler/x86-context-switch.rst -- 2.17.1
