Peter Zijlstra a233f1120c sched: Prepare for per-cpu preempt_count ... When using per-cpu preempt_count variables we need to save/restore the preempt_count on context switch (into per task storage; for instance the old thread_info::preempt_count variable) because of PREEMPT_ACTIVE. However, this means that on fork() the preempt_count value of the last context switch gets copied and if we had a PREEMPT_ACTIVE switch right before cloning a child task the child task will now too have PREEMPT_ACTIVE set and start its life with an extra PREEMPT_ACTIVE count. Therefore we need to make init_task_preempt_count() unconditional; this resets whatever preempt_count we inherited from our parent process. Doing so for !per-cpu implementations is harmless. For !PREEMPT_COUNT kernels we need to be careful not to start life with an increased preempt_count. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/tip-4k0b7oy1rcdyzochwiixuwi9@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>		2013-09-25 14:07:55 +02:00
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auto_group.c	sched/autogroup: Fix race with task_groups list	2013-05-28 09:40:22 +02:00
auto_group.h	Revert "sched/autogroup: Fix crash on reboot when autogroup is disabled"	2012-12-11 10:23:45 +01:00
clock.c	sched_clock: Prevent 64bit inatomicity on 32bit systems	2013-04-08 11:50:44 +02:00
core.c	sched: Prepare for per-cpu preempt_count	2013-09-25 14:07:55 +02:00
cpuacct.c	cgroup: pass around cgroup_subsys_state instead of cgroup in file methods	2013-08-08 20:11:24 -04:00
cpuacct.h	sched/cpuacct: Initialize root cpuacct earlier	2013-04-10 13:54:20 +02:00
cpupri.c	sched: Fix some kernel-doc warnings	2013-07-18 09:58:21 +02:00
cpupri.h
cputime.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-09-05 12:36:46 -07:00
debug.c	sched/debug: Take PID namespace into account	2013-09-12 19:14:16 +02:00
fair.c	sched/balancing: Periodically decay max cost of idle balance	2013-09-20 12:03:46 +02:00
features.h	mutex: Move mutex spinning code from sched/core.c back to mutex.c	2013-04-19 09:33:34 +02:00
idle_task.c	sched: Keep at least 1 tick per second for active dynticks tasks	2013-05-04 08:32:02 +02:00
Makefile	sched: Factor out load calculation code from sched/core.c --> sched/proc.c	2013-05-07 13:14:50 +02:00
proc.c	sched: Change get_rq_runnable_load() to static and inline	2013-06-27 10:07:44 +02:00
rt.c	sched/rt: Simplify pull_rt_task() logic and remove .leaf_rt_rq_list	2013-06-19 12:58:40 +02:00
sched.h	sched/balancing: Consider max cost of idle balance per sched domain	2013-09-20 12:03:44 +02:00
stats.c	fix a leak in /proc/schedstats	2013-04-29 15:41:45 -04:00
stats.h	sched: Micro-optimize by dropping unnecessary task_rq() calls	2013-09-25 13:51:06 +02:00
stop_task.c	sched: Use an accessor to read the rq clock	2013-05-28 09:40:27 +02:00