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b37a667c62
Systems built with CONFIG_RCU_NOCB_CPU=y but booted without either the rcu_nocbs= or rcu_nohz_full= kernel-boot parameters will not have callback offloading on any of the CPUs, nor can any of the CPUs be switched to enable callback offloading at runtime. Although this is intentional, it would be nice to have a way to offload all the CPUs without having to make random bootloaders specify either the rcu_nocbs= or the rcu_nohz_full= kernel-boot parameters. This commit therefore provides a new CONFIG_RCU_NOCB_CPU_DEFAULT_ALL Kconfig option that switches the default so as to offload callback processing on all of the CPUs. This default can still be overridden using the rcu_nocbs= and rcu_nohz_full= kernel-boot parameters. Reviewed-by: Kalesh Singh <kaleshsingh@google.com> Reviewed-by: Uladzislau Rezki <urezki@gmail.com> (In v4.1, fixed issues with CONFIG maze reported by kernel test robot). Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Joel Fernandes <joel@joelfernandes.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Reviewed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
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.