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As the mode of a resource group changes, the operations it can support may also change. One way in which the supported operations are managed is to modify the permissions of the files within the resource group's resctrl directory. At the moment only two possible permissions are supported: the default permissions or no permissions in support for when the operation is "locked down". It is possible where an operation on a resource group may have more possibilities. For example, if by default changes can be made to the resource group by writing to a resctrl file while the current settings can be obtained by reading from the file, then it may be possible that in another mode it is only possible to read the current settings, and not change them. Make it possible to modify some of the permissions of a resctrl file in support of a more flexible way to manage the operations on a resource group. In this preparation work the original behavior is maintained where all permissions are restored. Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: fenghua.yu@intel.com Cc: tony.luck@intel.com Cc: vikas.shivappa@linux.intel.com Cc: gavin.hindman@intel.com Cc: jithu.joseph@intel.com Cc: dave.hansen@intel.com Cc: hpa@zytor.com Link: https://lkml.kernel.org/r/8773aadfade7bcb2c48a45fa294a04d2c03bb0a1.1530421961.git.reinette.chatre@intel.com |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
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.