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Date: Wed, 20 Apr 2016 21:18:28 -0300
From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: David Ahern <dsahern@gmail.com>
Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Ingo Molnar <mingo@kernel.org>,
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        Milian Wolff <milian.wolff@kdab.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Stephane Eranian <eranian@google.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Vince Weaver <vincent.weaver@maine.edu>,
        Wang Nan <wangnan0@huawei.com>, Zefan Li <lizefan@huawei.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH/RFC] perf core: Allow setting up max frame stack depth
 via sysctl
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Em Wed, Apr 20, 2016 at 05:10:17PM -0600, David Ahern escreveu:
> On 4/20/16 4:47 PM, Arnaldo Carvalho de Melo wrote:
> >   # echo 256 > /proc/sys/kernel/perf_event_max_stack
> >   # cat /proc/sys/kernel/perf_event_max_stack
> >   256
 
> I would love to see something like this go in. Right now I have to recompile
> the kernel because I want a lower max count.
 
> In the past we talked about about making this part of the attribute with
> separate controls for both kernel stack and userspace stack. Have you given
> up on that option?

Nope, I'll try to work on that too, I even mentioned it above, the part
"one per event remains to be done".

- Arnaldo