[linux-elitists] netconsole module - kernel dmesg-over-network logging

Don Marti dmarti@zgp.org
Fri Dec 12 09:07:34 PST 2008


begin Greg KH quotation of Thu, Dec 11, 2008 at 07:54:38PM -0800:
> On Thu, Dec 11, 2008 at 05:13:49PM -0800, Don Marti wrote:
> > begin Karsten M. Self quotation of Thu, Dec 11, 2008 at 02:38:22PM -0800:
> > 
> > > For testing, you want to generate some kernel activity.
> > ....
> > > I'm open to other suggestions.
> > 
> > A module that just does a printk and then refuses
> > to be inserted?  Insmod it every time you want a
> > test line.
> 
> Heh, Alt-sysrq-T is much nicer than having to insert kernel code.  Or
> one of the other sysrq keys if you just want the kernel to output a line
> of text.

Yes, but with the module you can make it say whatever
you want.

Just looking at Documentation/sysrq.txt you
can do sysrq remotely too, without having to be at the
keyboard.  This does a sync and logs two lines:
  echo "echo s > /proc/sysrq-trigger" | sudo sh

-- 
Don Marti                                        +1 510-814-0932
http://zgp.org/~dmarti/                          +1 510-332-1587 mobile
dmarti@zgp.org
See you at OpenSource World: August 10-13, 2009 in San Francisco


More information about the linux-elitists mailing list