Re: [PATCH 3/3] tracing: Check cpu file on tracing_release()

From: Namhyung Kim
Date: Tue Apr 09 2013 - 21:30:18 EST


On Tue, 09 Apr 2013 20:46:27 -0400, Steven Rostedt wrote:
> On Wed, 2013-04-10 at 09:36 +0900, Namhyung Kim wrote:
>
>> You meant iter->cpu_file != RING_BUFFER_ALL_CPUS case, right?
>
> Yep.
>
>>
>> So why bother trying to check other cpus then?
>
> Because it's a very slow path (closing a file), and it keeps the code
> simpler and more condense.
>
> We could add your change for consistency, but right now, its very low
> priority.

Hmm.. okay.

>
> But looking at the code, I do see a clean up that looks like it would be
> worth updating. If the ring_buffer_read_prepare() fails, we should
> probably let the user know, instead of succeeding and then having no
> output.

How about below.. :)