* [PATCH v2] Documentation: add reference from dynamic debug to loglevel kernel params
@ 2024-07-09 13:51 Daniel Lublin
2024-07-09 15:00 ` Jonathan Corbet
0 siblings, 1 reply; 2+ messages in thread
From: Daniel Lublin @ 2024-07-09 13:51 UTC (permalink / raw)
To: Jonathan Corbet; +Cc: Daniel Lublin, linux-doc, linux-kernel
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@lublin.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.
+
Viewing Dynamic Debug Behaviour
===============================
--
2.45.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] Documentation: add reference from dynamic debug to loglevel kernel params
2024-07-09 13:51 [PATCH v2] Documentation: add reference from dynamic debug to loglevel kernel params Daniel Lublin
@ 2024-07-09 15:00 ` Jonathan Corbet
0 siblings, 0 replies; 2+ messages in thread
From: Jonathan Corbet @ 2024-07-09 15:00 UTC (permalink / raw)
To: Daniel Lublin; +Cc: Daniel Lublin, linux-doc, linux-kernel
Daniel Lublin <daniel@lublin.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@lublin.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
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