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The cpus file is extended to support resource monitoring. This is used to over-ride the RMID of the default group when running on specific CPUs. It works similar to the resource control. The "cpus" and "cpus_list" file is present in default group, ctrl_mon groups and monitor groups. Each "cpus" file or cpu_list file reads a cpumask or list showing which CPUs belong to the resource group. By default all online cpus belong to the default root group. A CPU can be present in one "ctrl_mon" and one "monitor" group simultaneously. They can be added to a resource group by writing the CPU to the file. When a CPU is added to a ctrl_mon group it is automatically removed from the previous ctrl_mon group. A CPU can be added to a monitor group only if it is present in the parent ctrl_mon group and when a CPU is added to a monitor group, it is automatically removed from the previous monitor group. When CPUs go offline, they are automatically removed from the ctrl_mon and monitor groups. Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: ravi.v.shankar@intel.com Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com Cc: peterz@infradead.org Cc: eranian@google.com Cc: vikas.shivappa@intel.com Cc: ak@linux.intel.com Cc: davidcc@google.com Cc: reinette.chatre@intel.com Link: http://lkml.kernel.org/r/1501017287-28083-18-git-send-email-vikas.shivappa@linux.intel.com |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.