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In order to address the issue with short idle duration predictions by the idle governor after the scheduler tick has been stopped, split tick_nohz_stop_sched_tick() into two separate routines, one computing the time to the next timer event and the other simply stopping the tick when the time to the next timer event is known. Prepare these two routines to be called separately, as one of them will be called by the idle governor in the cpuidle_select() code path after subsequent changes. Update the former callers of tick_nohz_stop_sched_tick() to use the new routines, tick_nohz_next_event() and tick_nohz_stop_tick(), instead of it and move the updates of the sleep_length field in struct tick_sched into __tick_nohz_idle_stop_tick() as it doesn't need to be updated anywhere else. There should be no intentional visible changes in functionality resulting from this change. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
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.