From 9784f29bf59b2fe7a968be9394afb39a25ac0114 Mon Sep 17 00:00:00 2001 From: Daniel Lublin Date: Tue, 9 Jul 2024 15:51:57 +0200 Subject: [PATCH] Documentation: add reference from dynamic debug to loglevel kernel params 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 Signed-off-by: Jonathan Corbet Link: https://lore.kernel.org/r/4633bdb82c1c7c014d79840887878624a55c59f8.1720533043.git.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 ===============================