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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2013-07-10 02:44:35 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2013-08-14 17:14:46 +0200 |
| commit | 48d6a816a8bf36e2a197c322697323003bdc1cfe (patch) | |
| tree | 6a51b602ec4451b8443b2b58337e9a55c84ceb48 /kernel/sched/cputime.c | |
| parent | ad65782fba507d91a0a98f519b59e79cac1b474c (diff) | |
| download | blackbird-op-linux-48d6a816a8bf36e2a197c322697323003bdc1cfe.tar.gz blackbird-op-linux-48d6a816a8bf36e2a197c322697323003bdc1cfe.zip | |
context_tracking: Optimize guest APIs off case with static key
Optimize guest entry/exit APIs with static keys. This minimize
the overhead for those who enable CONFIG_NO_HZ_FULL without
always using it. Having no range passed to nohz_full= should
result in the probes overhead to be minimized.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Kevin Hilman <khilman@linaro.org>
Diffstat (limited to 'kernel/sched/cputime.c')
| -rw-r--r-- | kernel/sched/cputime.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index 223a35efa0a6..bb6b29a3067c 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -724,6 +724,7 @@ void vtime_guest_enter(struct task_struct *tsk) current->flags |= PF_VCPU; write_sequnlock(&tsk->vtime_seqlock); } +EXPORT_SYMBOL_GPL(vtime_guest_enter); void vtime_guest_exit(struct task_struct *tsk) { @@ -732,6 +733,7 @@ void vtime_guest_exit(struct task_struct *tsk) current->flags &= ~PF_VCPU; write_sequnlock(&tsk->vtime_seqlock); } +EXPORT_SYMBOL_GPL(vtime_guest_exit); void vtime_account_idle(struct task_struct *tsk) { |
