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fbfbf86685
With some recent proposed changes [1] in the deadline server code, it has caused a test failure in test_cpuset_prs.sh when a change is being made to an isolated partition. This is due to failing the cpuset_cpumask_can_shrink() check for SCHED_DEADLINE tasks at validate_change(). This is actually a false positive as the failed test case involves an isolated partition with load balancing disabled. The deadline check is not meaningful in this case and the users should know what they are doing. Fix this by doing the cpuset_cpumask_can_shrink() check only when loading balanced is enabled. Also change its arguments to use effective_cpus for the current cpuset and user_xcpus() as an approiximation for the target effective_cpus as the real effective_cpus hasn't been fully computed yet as this early stage. As the check isn't comprehensive, there may be false positives or negatives. We may have to revise the code to do a more thorough check in the future if this becomes a concern. [1] https://lore.kernel.org/lkml/82be06c1-6d6d-4651-86c9-bcc828cbcb80@redhat.com/T/#t 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 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.