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c5ebe66ce7
There is currently event tracing to track when a task is preempted within a preemptible RCU read-side critical section, and also when that task subsequently reaches its outermost rcu_read_unlock(), but none indicating when a new grace period starts when that grace period must wait on pre-existing readers that have been been preempted at least once since the beginning of their current RCU read-side critical sections. This commit therefore adds an event trace at grace-period start in the case where there are such readers. Note that only the first reader in the list is traced. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
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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.