Re: [PATCH] mac80211_hwsim: use dyndbg for debug messages

[Johannes Berg]

On Wed, 2017-06-28 at 06:37 -0700, Joe Perches wrote:
> On Wed, 2017-06-28 at 15:17 +0200, Lubomir Rintel wrote:
> > The mac80211_hwsim doesn't offer a way to disable the debugging
> > output.
> > Unfortunately, it's pretty chatty, dumping aÂÂlot of stuff into the
> > message
> > buffer.
> > 
> > This patch changes it to use dyndbg for controlling the debug
> > output.
> > It's disabled by default, but can be enabled by a module parameter
> > (1),
> > at runtime (2) or persisted in modprobe.conf (3).
> > 
> > Â (1) modprobe mac80211_hwsim dyndbg=+p
> > Â (2) echo "module mac80211_hwsim +p"
> > >/sys/kernel/debug/dynamic_debug/control
> > Â (3) echo "options mac80211_hwsim dyndbg=+p"
> > >>/etc/modprobe.d/my.conf
> 
> I wonder about the value at all of the 2 forms:
> 
> wiphy_dbg	-> only with #define DEBUG or dynamic_debug
> wiphy_debug	-> always emitted at KERN_DEBUG
> 
> Is there any real value in wiphy_debug?
> 
> Should it just be converted to
> 
> #define wiphy_debug	wiphy_dbg

I don't think it should, there are some messages that we'd probably
just have to give a higher priority if we did this.

johannes