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Waiman Long
668e041662
Before commitf0af1bfc27("cgroup/cpuset: Relax constraints to partition & cpus changes"), a cpuset partition cannot be enabled if not all the requested CPUs can be granted from the parent cpuset. After that commit, a cpuset partition can be created even if the requested exclusive CPUs contain CPUs not allowed its parent. The delmask containing exclusive CPUs to be removed from its parent wasn't adjusted accordingly. That is not a problem until the introduction of a new isolated_cpus mask in commit11e5f407b6("cgroup/cpuset: Keep track of CPUs in isolated partitions") as the CPUs in the delmask may be added directly into isolated_cpus. As a result, isolated_cpus may incorrectly contain CPUs that are not isolated leading to incorrect data reporting. Fix this by adjusting the delmask to reflect the actual exclusive CPUs for the creation of the partition. Fixes:11e5f407b6("cgroup/cpuset: Keep track of CPUs in isolated partitions") Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org>
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 reStructuredText 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.