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1f1562fcd0
In validate_change(), there is a check since v2.6.12 to make sure that each of the child cpusets must be a subset of a parent cpuset. IOW, it allows child cpusets to restrict what changes can be made to a parent's "cpuset.cpus". This actually violates one of the core principles of the default hierarchy where a cgroup higher up in the hierarchy should be able to change configuration however it sees fit as deligation breaks down otherwise. To address this issue, the check is now removed for the default hierarchy to free parent cpusets from being restricted by child cpusets. The check will still apply for legacy hierarchy. Suggested-by: Tejun Heo <tj@kernel.org> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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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.
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.