[LAU] options for hard real time kernel for raring 13.04

[Ralf Mardorf]

On Thu, 2013-09-12 at 09:46 +0200, Jeremy Jongepier wrote:
> On 09/12/2013 09:40 AM, Raffaele Morelli wrote:
> > 2013/9/12 Jeremy Jongepier <jeremy at autostatic.com>:
> >> On 09/12/2013 07:16 AM, Raffaele Morelli wrote:
> >>> 2013/9/11 Marco Donnarumma <devel at thesaddj.com>
> >>>>
> >>>> sorry, had forgot the link, see the 4th reply at
> >>>> http://askubuntu.com/questions/72964/how-can-i-install-a-realtime-kernel
> >>>
> >>> In 4th reply: `cp /boot/config-$(uname -r) .config && make oldconfig`
> >>>
> >>> this is quite unnecessary as `make oldconfig` will prompt you for
> >>> newer configs not found in your current kernel configuration, moreover
> >>> make-kpkg does run `make oldconfig` before start compiling.
> >>>
> >>> /r
> >>
> >> True but you still need to run make oldconfig somehow otherwise you end
> >> up with the Preemption Model of the original config you're using.
> >>
> >> Best,
> >>
> >> Jeremy
> > 
> > Quote from man page:
> > 
> > Normally,  if  kernel-package  does not find a .config file in the current
> >        directory, it tries very hard to get an appropriate one (usually a con-
> >        fig  file  already  tailored for Debian kernels for that architecture),
> >        and then calls make oldconfig to let the user answer any new questions.
> > 
> > 
> > So if you apply the RT patch, make-kpkg will ask you about preemption model.
> > 
> > /r
> 
> Yes I know but I didn't formulate my earlier e-mail well enough. What I
> mean is that you still need to run make oldconfig, be it separately or
> be it via make-kpkg. When I think about it I wondered why I replied in
> the first place, your mail explains it all. Sorry for the noise :-|

It's sane to do it the
  cp /boot/config-$(uname -r) .config && make oldconfig
way, so the OP does understand what's going on and the
  /boot/config-$(uname -r)
could be replaced to use any other wanted config, instead the one of the
running kernel. I even didn't know that make-kpkg does it automatically.
I would recommend to edit the config, to fit to the OP's machine before
running oldconfig.

  # e.g. for Opteron/Athlon64/Hammer/K8
  echo "CONFIG_MK8=y" >> /path/to/.config
 
  # e.g. 32-bit only
  # HIGHMEM from 4G to 64G
  echo "CONFIG_HIGHMEM4G is not set" >> /path/to/.config
  echo "CONFIG_HIGHMEM64G=y" >> /path/to/.config

2 Cents,
Ralf