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When a (group) entity changes it's weight we should instantly change its load_avg and propagate that change into the sums it is part of. Because we use these values to predict future behaviour and are not interested in its historical value. Without this change, the change in load would need to propagate through the average, by which time it could again have changed etc.. always chasing itself. With this change, the cfs_rq load_avg sum will more accurately reflect the current runnable and expected return of blocked load. Reported-by: Paul Turner <pjt@google.com> [josef: compile fix !SMP || !FAIR_GROUP] Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@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.