linux-kernel - [PATCH 04/16] dynamic_debug: change verbosity at runtime

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Message-Id: <877d7d20087650eaefcbc2725739e060c6203534.1324318997.git.jbaron@redhat.com>
Date:	Mon, 19 Dec 2011 17:12:24 -0500
From:	Jason Baron <jbaron@...hat.com>
To:	greg@...ah.com
Cc:	jim.cromie@...il.com, joe@...ches.com, bart.vanassche@...il.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH 04/16] dynamic_debug: change verbosity at runtime

From: Jim Cromie <jim.cromie@...il.com>

Allow changing dynamic_debug verbosity at run-time, to ease debugging
of ddebug queries as you add them, improving usability.

at boot time: dynamic_debug.verbose=1
at runtime:
root@...age:~# echo 1 > /sys/module/dynamic_debug/parameters/verbose

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
Signed-off-by: Jason Baron <jbaron@...hat.com>
---
 lib/dynamic_debug.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 416c079..8c88b89 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -60,6 +60,7 @@ struct ddebug_iter {
 static DEFINE_MUTEX(ddebug_lock);
 static LIST_HEAD(ddebug_tables);
 static int verbose = 0;
+module_param(verbose, int, 0644);
 
 /* Return the last part of a pathname */
 static inline const char *basename(const char *path)
-- 
1.7.7.3

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