kernel loglevel

[Wenda Ni]

Hi Joel,

It works by specifying ccflags-y += -DDEBUG in the Makefile.

Thank you for the info!!!!


Cheers,

Wenda Ni, Ph.D.


On Mon, Oct 17, 2016 at 7:48 PM, Joel Fernandes <agnel.joel at gmail.com>
wrote:

> Hi Wenda,
>
> pr_debug needs you to define the DEBUG macro to activate it.
>
> Check:
> http://stackoverflow.com/questions/28936199/pr-debug-not-giving-any-output
>
> and the kernel docs,
> https://www.kernel.org/doc/local/pr_debug.txt
>
> Joel
>
> On Mon, Oct 17, 2016 at 4:17 PM, Wenda Ni <wonda.ni at gmail.com> wrote:
> > Dear all,
> >
> > I am working on a kernel module that incorporate both pr_debug and
> > pr_warn. I would like to see pr_debug messages from dmesg.
> >
> > What I followed is to specify kernel parameter by saying "loglevel=7".
> > This can be seen confirmed  from /proc/cmdline. But still, I donot get
> > pr_debug level messages either from dmesg or from /var/log/messages. I
> > also tried echo 7 > /proc/sys/kernel/printk. It does not return what I
> > expect, either.
> >
> > Let me know what I am missing. Thank you very much in advance.
> >
> > Cheers,
> >
> > Wenda Ni, Ph.D.
> >
> > _______________________________________________
> > Kernelnewbies mailing list
> > Kernelnewbies at kernelnewbies.org
> > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
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