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ba1c64c272
This commit reduces the latency of expedited RCU grace periods by reporting a quiescent state for the CPU at context-switch time. In CONFIG_PREEMPT=y kernels, if the outgoing task is still within an RCU read-side critical section (and thus still blocking some grace period, perhaps including this expedited grace period), then that task will already have been placed on one of the leaf rcu_node structures' ->blkd_tasks list. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.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.
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.