Re: [Madwifi-devel] out put of DPRINTF

[Michael R. <ma...@no...>]

Hi.

> or IEEE80211_DPRINTF ?? these macro also using printk as well, but NOT
> printing kernel log (dmesg)
> where this output goes and how can I see them ??

All output that is generated via printk this goes to the kernel log ring
buffer, which then usually is processed by some logging daemon, such as
klogd (part of the sysklog package) or syslog-ng. Usually they then write
the messages to some local log-file or a remote syslog server.

dmesg also accesses that buffer and should print the current buffer
content to the console. If the expected messages don't occur there, then
either the printk-statements are not called, printk is called in the wrong
way (very unusual) or there is something wrong with your setup.


The book "Linux Device Drivers" is a great resource that should be in the
shelf of everyone fiddling around with device drivers. For example, the
printk stuff is described in chapter 4 ("Debugging techniques") on page
76ff. The book is available for free, for example on
http://lwn.net/Kernel/LDD3/ . I suggest you take a look at that, too.

Bye, Mike