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  • ftrace.txt
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  • GeunSik Lim's avatar
    ftrace: fix typo about map of kernel priority in ftrace.txt file. · 294ae401
    GeunSik Lim authored May 28, 2009
    Fix typo about chart to map the kernel priority to user land priorities.
    
       * About sched_setscheduler(2)
          Processes scheduled under SCHED_FIFO or SCHED_RR
          can have a (user-space) static priority in the range 1 to 99.
          (reference: http://www.kernel.org/doc/man-pages/online/pages/
    
    
                      man2/sched_setscheduler.2.html)
    
       * From: Steven Rostedt
          0 to 98 - maps to RT tasks 99 to 1 (SCHED_RR or SCHED_FIFO)
    
          99 - maps to internal kernel threads that want to be lower than RT tasks
          but higher than SCHED_OTHER tasks. Although I'm not sure if any
          kernel thread actually uses this. I'm not even sure how this can be
          set, because the internal sched_setscheduler function does not allow
          for it.
    
          100 to 139 - maps nice levels -20 to 19. These are not set via
          sched_setscheduler, but are set via the nice system call.
    
          140 - reserved for idle tasks.
    
    Signed-off-by: default avatarGeunSik Lim <geunsik.lim@samsung.com>
    Acked-by: default avatarSteven Rostedt <rostedt@goodmis.org>
    Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
    LKML-Reference: <new-submission>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    294ae401

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