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Paul E. McKenney
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This commit adds a description of how expedited grace periods operate during the mid-boot "dead zone", which starts when the scheduler spawns the first kthread and ends when all of RCU's kthreads have been spawned. In short, before mid-boot, synchronous grace periods can be a no-op. After the end of mid-boot, workqueues may be used. During mid-boot, the requesting task drivees the expedited grace period. For more detail, see https://lwn.net/Articles/716148/. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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.