From: Roel Kluin <12o3l@tiscali.nl>
To: lkml <linux-kernel@vger.kernel.org>
Subject: Debugging activated during runtime
Date: Sun, 28 Oct 2007 16:15:15 +0100 [thread overview]
Message-ID: <4724A783.9050400@tiscali.nl> (raw)
Wouldn't it be nice to be able to specify upon loading, or during runtime
to modules whether debug messages should be printed?
- No kernel recompile needed for debugging.
- Less *_DEBUG options required in menuconfig.
How I think this could work:
Add to the module struct a bool to denote debugging state. If set, pr_debug
forwards messages to printk.
Another advantage:
- A module could be loaded after an unexpected conditions (e.g. after a BUG_ON).
Caveats I can see right now:
- For modules often loaded during boot this may not be a good solution.
Alternatively, instead of a bool for the debug state, the module struct could
also get a log-level flag: messages below that level won't be printed.
next reply other threads:[~2007-10-28 15:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-28 15:15 Roel Kluin [this message]
2007-10-28 15:23 ` Debugging activated during runtime Jan Engelhardt
2007-10-28 16:07 ` Roel Kluin
2007-10-28 16:18 ` Jan Engelhardt
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