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This commit upgrades rcuperf so that it can do performance testing on asynchronous grace-period primitives such as call_srcu(). There is a new rcuperf.gp_async module parameter that specifies this new behavior, with the pre-existing rcuperf.gp_exp testing expedited grace periods such as synchronize_rcu_expedited, and with the default being to test synchronous non-expedited grace periods such as synchronize_rcu(). There is also a new rcuperf.gp_async_max module parameter that specifies the maximum number of outstanding callbacks per writer kthread, defaulting to 1,000. When this limit is exceeded, the writer thread invokes the appropriate flavor of rcu_barrier() to wait for callbacks to drain. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> [ paulmck: Removed the redundant initialization noted by Arnd Bergmann. ]
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.