Cheng Chao bf89a30472 stop_machine: Avoid a sleep and wakeup in stop_one_cpu() ...

In case @cpu == smp_proccessor_id(), we can avoid a sleep+wakeup
cycle by doing a preemption.

Callers such as sched_exec() can benefit from this change.

Signed-off-by: Cheng Chao <cs.os.kernel@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: akpm@linux-foundation.org
Cc: chris@chris-wilson.co.uk
Cc: tj@kernel.org
Link: http://lkml.kernel.org/r/1473818510-6779-1-git-send-email-cs.os.kernel@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-09-22 14:53:45 +02:00

..

auto_group.c

sched/core: Move the sched_to_prio[] arrays out of line

2015-12-04 10:34:46 +01:00

auto_group.h

sched, timer: Convert usages of ACCESS_ONCE() in the scheduler to READ_ONCE()/WRITE_ONCE()

2015-05-08 12:11:32 +02:00

clock.c

sched/clock: Make local_clock()/cpu_clock() inline

2016-04-13 12:25:22 +02:00

completion.c

sched/completion: Serialize completion_done() with complete()

2015-02-18 14:27:40 +01:00

core.c

stop_machine: Avoid a sleep and wakeup in stop_one_cpu()

2016-09-22 14:53:45 +02:00

cpuacct.c

sched/cpuacct: Introduce cpuacct.usage_all to show all CPU stats together

2016-07-09 13:56:15 +02:00

cpuacct.h

sched/cpuacct: Simplify the cpuacct code

2016-03-21 11:00:28 +01:00

cpudeadline.c

sched/deadline: Split cpudl_set() into cpudl_set() and cpudl_clear()

2016-09-05 13:29:43 +02:00

cpudeadline.h

sched/deadline: Split cpudl_set() into cpudl_set() and cpudl_clear()

2016-09-05 13:29:43 +02:00

cpufreq_schedutil.c

cpufreq: schedutil: map raw required frequency to driver frequency

2016-07-21 22:28:21 +02:00

cpufreq.c

cpufreq: sched: Helpers to add and remove update_util hooks

2016-04-02 01:08:43 +02:00

cpupri.c

sched/core: Use tsk_cpus_allowed() instead of accessing ->cpus_allowed

2016-05-12 09:55:35 +02:00

cpupri.h

sched/cpupri: Remove unnecessary definitions in cpupri.h

2014-11-16 10:58:59 +01:00

cputime.c

sched/cputime: Improve scalability by not accounting thread group tasks pending runtime

2016-08-18 11:53:46 +02:00

deadline.c

sched/deadline: Fix the intention to re-evalute tick dependency for offline CPU

2016-09-05 13:29:45 +02:00

debug.c

sched/debug: Remove several CONFIG_SCHEDSTATS guards

2016-09-05 13:29:47 +02:00

fair.c

Revert "sched/fair: Make update_min_vruntime() more readable"

2016-09-10 11:17:40 +02:00

features.h

sched/fair: Convert arch_scale_cpu_capacity() from weak function to #define

2015-09-13 09:52:55 +02:00

idle_task.c

sched/debug: Clean up schedstat macros

2016-09-05 13:29:46 +02:00

idle.c

Merge branch 'sched/urgent' into sched/core, to pick up fixes

2016-06-14 11:04:13 +02:00

loadavg.c

sched/core: Correct off by one bug in load migration calculation

2016-07-13 14:58:20 +02:00

Makefile

cpufreq: schedutil: New governor based on scheduler utilization data

2016-04-02 01:09:12 +02:00

rt.c

sched/core: Provide a tsk_nr_cpus_allowed() helper

2016-05-12 09:55:36 +02:00

sched.h

sched/core: Store maximum per-CPU capacity in root domain

2016-08-18 11:26:55 +02:00

stats.c

sched: use %*pb[l] to print bitmaps including cpumasks and nodemasks

2015-02-13 21:21:37 -08:00

stats.h

sched/debug: Rename 'schedstat_val()' -> 'schedstat_val_or_zero()'

2016-09-05 13:29:46 +02:00

stop_task.c

locking/lockdep, sched/core: Implement a better lock pinning scheme

2016-05-05 09:23:59 +02:00

swait.c

wait.[ch]: Introduce the simple waitqueue (swait) implementation

2016-02-25 11:27:16 +01:00

wait.c

sched/wait: Fix the signal handling fix

2015-12-13 14:30:59 -08:00