Re: [PATCH] tracing: mark get_parent_ip() notrace

[Frederic Weisbecker <fweisbec@gmail.com>]

On Thu, Apr 02, 2009 at 02:18:25PM +0800, Lai Jiangshan wrote:
> 
> Impact: remove redundancy tracing log
> 
> When tracer is "function" or "function_graph", too much
> "get_parent_ip" are recorded in ring_buffer.


Thanks, indeed this get_parent_ip was a bit harrassing
in the traces, though I still don't understand why it is
called so often.

Anyway, tracing it seems to me not useful.

Acked-by: Frederic Weisbecker <fweisbec@gmail.com>


 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
> ---
> diff --git a/kernel/sched.c b/kernel/sched.c
> index 706517c..a0ec10c 100644
> --- a/kernel/sched.c
> +++ b/kernel/sched.c
> @@ -4860,7 +4860,7 @@ void scheduler_tick(void)
>  #endif
>  }
>  
> -unsigned long get_parent_ip(unsigned long addr)
> +notrace unsigned long get_parent_ip(unsigned long addr)
>  {
>  	if (in_lock_functions(addr)) {
>  		addr = CALLER_ADDR2;
> 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/