linux-kernel - Re: [PATCH] tracing: Use task_nice() in function __update_max

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Message-ID: <52F996BF.402@cn.fujitsu.com>
Date:	Tue, 11 Feb 2014 11:19:27 +0800
From:	Dongsheng Yang <yangds.fnst@...fujitsu.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	linux-kernel@...r.kernel.org, rostedt@...dmis.org,
	fweisbec@...il.com, mingo@...hat.com
Subject: Re: [PATCH] tracing: Use task_nice() in function __update_max_tr()
 to get the nice value of task.

Hi Steve,
     As my patch to implement task_nice() as inline function was applied 
to tip tree.
http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=d0ea026808ad81de2af14938448419a95211b938

     Please consider to apply this patch in this thread. Thanx :)

On 01/23/2014 06:41 AM, Dongsheng Yang 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@...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);
>   	max_data->policy = tsk->policy;
>   	max_data->rt_priority = tsk->rt_priority;
>   

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