From 7110744516276e906f9197e2857d026eb2343393 Mon Sep 17 00:00:00 2001 From: Jason Low Date: Tue, 28 Apr 2015 13:00:24 -0700 Subject: [PATCH] sched, timer: Use the atomic task_cputime in thread_group_cputimer Recent optimizations were made to thread_group_cputimer to improve its scalability by keeping track of cputime stats without a lock. However, the values were open coded to the structure, causing them to be at a different abstraction level from the regular task_cputime structure. Furthermore, any subsequent similar optimizations would not be able to share the new code, since they are specific to thread_group_cputimer. This patch adds the new task_cputime_atomic data structure (introduced in the previous patch in the series) to thread_group_cputimer for keeping track of the cputime atomically, which also helps generalize the code. Suggested-by: Ingo Molnar Signed-off-by: Jason Low Signed-off-by: Peter Zijlstra (Intel) Acked-by: Thomas Gleixner Acked-by: Rik van Riel Cc: Andrew Morton Cc: Aswin Chandramouleeswaran Cc: Borislav Petkov Cc: Davidlohr Bueso Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Mel Gorman Cc: Mike Galbraith Cc: Oleg Nesterov Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Preeti U Murthy Cc: Scott J Norton Cc: Steven Rostedt Cc: Waiman Long Link: http://lkml.kernel.org/r/1430251224-5764-6-git-send-email-jason.low2@hp.com Signed-off-by: Ingo Molnar --- Reading git-format-patch failed