Peter Zijlstra 7490d0a4cf sched/nohz: Rewrite and fix load-avg computation -- again ... commit 5167e8d541 upstream. Thanks to Charles Wang for spotting the defects in the current code: - If we go idle during the sample window -- after sampling, we get a negative bias because we can negate our own sample. - If we wake up during the sample window we get a positive bias because we push the sample to a known active period. So rewrite the entire nohz load-avg muck once again, now adding copious documentation to the code. Reported-and-tested-by: Doug Smythies <dsmythies@telus.net> Reported-and-tested-by: Charles Wang <muming.wq@gmail.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/1340373782.18025.74.camel@twins [ minor edits ] Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2012-07-19 08:58:56 -07:00
..
auto_group.c	sched: Clean up parameter passing of proc_sched_autogroup_set_nice()	2012-03-02 12:23:49 +01:00
auto_group.h	sched: Move all scheduler bits into kernel/sched/	2011-11-17 12:20:22 +01:00
clock.c	sched: Move all scheduler bits into kernel/sched/	2011-11-17 12:20:22 +01:00
core.c	sched/nohz: Rewrite and fix load-avg computation -- again	2012-07-19 08:58:56 -07:00
cpupri.c	kernel-doc: fix kernel-doc warnings in sched	2012-01-23 08:44:54 -08:00
cpupri.h	sched: Move all scheduler bits into kernel/sched/	2011-11-17 12:20:22 +01:00
debug.c	sched: Remove sched_switch	2012-01-27 13:28:53 +01:00
fair.c	sched: Fix more load-balancing fallout	2012-04-26 12:54:52 +02:00
features.h	sched: Fix more load-balancing fallout	2012-04-26 12:54:52 +02:00
idle_task.c	sched/nohz: Rewrite and fix load-avg computation -- again	2012-07-19 08:58:56 -07:00
Makefile	sched: Move all scheduler bits into kernel/sched/	2011-11-17 12:20:22 +01:00
rt.c	sched/rt: Improve pick_next_highest_task_rt()	2012-03-27 14:52:12 +02:00
sched.h	sched/nohz: Rewrite and fix load-avg computation -- again	2012-07-19 08:58:56 -07:00
stats.c	sched: Remove sched_switch	2012-01-27 13:28:53 +01:00
stats.h	Merge branch 'sched/core' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into cputime-tip	2011-12-19 19:23:15 +01:00
stop_task.c	sched: Move all scheduler bits into kernel/sched/	2011-11-17 12:20:22 +01:00