Messages in this thread | | | Date | Wed, 22 Jan 2014 22:56:32 -0500 | From | Steven Rostedt <> | Subject | Re: [PATCH] tracing: Use task_nice() in function __update_max_tr() to get the nice value of task. |
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On Wed, 22 Jan 2014 17:41:45 -0500 Dongsheng Yang <yangds.fnst@cn.fujitsu.com> wrote:
> There is already a function named task_nice in sched.h to get the nice value > of task_struct. We can use it in __update_max_tr() rather than calculate it > manually. > > Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> > --- > kernel/trace/trace.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c > index 9d20cd9..ec149b4 100644 > --- a/kernel/trace/trace.c > +++ b/kernel/trace/trace.c > @@ -970,7 +970,7 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu) > else > max_data->uid = task_uid(tsk); > > - max_data->nice = tsk->static_prio - 20 - MAX_RT_PRIO; > + max_data->nice = task_nice(tsk);
Except that's a function call in a critical path. Switch it to TASK_NICE(), and I'll take the patch.
Thanks,
-- Steve
> max_data->policy = tsk->policy; > max_data->rt_priority = tsk->rt_priority; >
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