1. 09 May, 2017 1 commit
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    • Jiri Olsa's avatar
      x86/intel_rdt: Add cpus_list rdtgroup file · 4ffa3c97
      Jiri Olsa authored
      
      
      The resource control filesystem provides only a bitmask based cpus file for
      assigning CPUs to a resource group. That's cumbersome with large cpumasks
      and non-intuitive when modifying the file from the command line.
      
      Range based cpu lists are commonly used along with bitmask based cpu files
      in various subsystems throughout the kernel.
      
      Add 'cpus_list' file which is CPU range based.
      
        # cd /sys/fs/resctrl/
        # echo 1-10 > krava/cpus_list
        # cat krava/cpus_list
        1-10
        # cat krava/cpus
        0007fe
        # cat cpus
        fffff9
        # cat cpus_list
        0,3-23
      
      [ tglx: Massaged changelog and replaced "bitmask lists" by "CPU ranges" ]
      Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Shaohua Li <shli@fb.com>
      Link: http://lkml.kernel.org/r/20170410145232.GF25354@krava
      
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      4ffa3c97
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