linux-kernel - Re: [PATCH V4 3/3] Documentation/osnoise: Add osnoise/options documentation

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Date:   Thu, 1 Dec 2022 10:59:57 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Daniel Bristot de Oliveira <bristot@...nel.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Juri Lelli <juri.lelli@...hat.com>,
        Clark Williams <williams@...hat.com>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4 3/3] Documentation/osnoise: Add osnoise/options
 documentation

On Wed, Nov 30, 2022 at 07:35:42PM +0100, Daniel Bristot de Oliveira wrote:
> diff --git a/Documentation/trace/osnoise-tracer.rst b/Documentation/trace/osnoise-tracer.rst
> index 3c675ed82b27..f2008e317223 100644
> --- a/Documentation/trace/osnoise-tracer.rst
> +++ b/Documentation/trace/osnoise-tracer.rst
> @@ -92,8 +92,8 @@ Note that the example above shows a high number of HW noise samples.
>  The reason being is that this sample was taken on a virtual machine,
>  and the host interference is detected as a hardware interference.
>  
> -Tracer options
> ----------------------
> +Tracer Configuration
> +--------------------
>  
>  The tracer has a set of options inside the osnoise directory, they are:
>  
> @@ -115,6 +115,22 @@ The tracer has a set of options inside the osnoise directory, they are:
>     NO_OSNOISE_WORKLOAD disables the OSNOISE_WORKLOAD option. The
>     special DEAFAULTS option resets all options to the default value.
>  
> +Tracer Options
> +--------------
> +
> +The osnoise/options file exposes a set of on/off configuration options for
> +the osnoise tracer. These options are:
> +
> + - DEFAULTS: reset the options to the default value.
> + - OSNOISE_WORKLOAD: do not dispatch osnoise workload (see dedicated
> +   section below).
> + - PANIC_ON_STOP: call panic() if the tracer stops. This option serves to
> +   capture a vmcore.
> + - OSNOISE_PREEMPT_DISABLE: disable preemption while running the osnoise
> +   workload, allowing only IRQ and hardware-related noise.
> + - OSNOISE_IRQ_DISABLE: disable IRQs while running the osnoise workload,
> +   allowing only NMIs and hardware-related noise, like hwlat tracer.
> +
>  Additional Tracing
>  ------------------
>  

The doc LGTM, thanks!

Reviewed-by: Bagas Sanjaya <bagasdotme@...il.com>

-- 
An old man doll... just what I always wanted! - Clara

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