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00a8b4b54c
Currently, call_rcu_tasks_generic() sets ->percpu_enqueue_shift to order_base_2(nr_cpu_ids) upon encountering sufficient contention. This does not shift to use of non-CPU-0 callback queues as intended, but rather continues using only CPU 0's queue. Although this does provide some decrease in contention due to spreading work over multiple locks, it is not the dramatic decrease that was intended. This commit therefore makes call_rcu_tasks_generic() set ->percpu_enqueue_shift to 0. Reported-by: Neeraj Upadhyay <quic_neeraju@quicinc.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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| README | ||
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.