linux-kernel - Re: [PATCH v2] Documentation: add reference from dynamic debug to loglevel kernel params

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Message-ID: <87plrm8vb5.fsf@trenco.lwn.net>
Date: Tue, 09 Jul 2024 09:00:14 -0600
From: Jonathan Corbet <corbet@....net>
To: Daniel Lublin <daniel@...lin.se>
Cc: Daniel Lublin <daniel@...lin.se>, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Documentation: add reference from dynamic debug to
 loglevel kernel params

Daniel Lublin <daniel@...lin.se> writes:

> This is useful information for somebody who has managed to dig into
> enabling debug output, but is wondering why there is no such output
> appearing on the console.
>
> Signed-off-by: Daniel Lublin <daniel@...lin.se>
> ---
>  Documentation/admin-guide/dynamic-debug-howto.rst | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/Documentation/admin-guide/dynamic-debug-howto.rst b/Documentation/admin-guide/dynamic-debug-howto.rst
> index 0e9b48daf690..7c036590cd07 100644
> --- a/Documentation/admin-guide/dynamic-debug-howto.rst
> +++ b/Documentation/admin-guide/dynamic-debug-howto.rst
> @@ -26,6 +26,11 @@ Dynamic debug provides:
>     - format string
>     - class name (as known/declared by each module)
>  
> +NOTE: To actually get the debug-print output on the console, you may
> +need to adjust the kernel ``loglevel=``, or use ``ignore_loglevel``.
> +Read about these kernel parameters in
> +Documentation/admin-guide/kernel-parameters.rst.
> +

I've applied this, thanks.

jon