realtime kernel for Debian

[Grammostola Rosea]

Adrian Knoth wrote:
> On Wed, Mar 25, 2009 at 12:37:37PM +0100, Grammostola Rosea wrote:
>
>   
>>>>> Why only in 64studio and not in plain Debian?
>>>>>           
>>> What's good for Debian is good for us :-) but the Debian project may 
>>> not want to tweak the kernel or the FireWire stack just for the 
>>> benefit of FFADO users. In the 64 Studio project we have more 
>>> flexibility to do things like that.
>>> Some background info here:
>>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/276463 
>>>       
>> What is true about this? Shouldn't plain Debian also support those Pro 
>> audio Firewire devices, the ones the FFADO team are making drivers for?
>>     
>
>
> It's easy:
>
> http://ieee1394.wiki.kernel.org/index.php/Juju_Migration#Module_auto-loading
>
>
> Compile both modules and blacklist the new Juju modules. That's the
> current upstream recommendation.
>
> Even if the default will change around 2.6.30 (or later, I don't know
> the exact schedule), the FFADO users could still enable the old ieee1394
> modules.
>
> We already have libraw1394-v2 in sid, but as outlined, FFADO currently
> only works with the old stack. This might also change in the future,
> especially if the Google Summer of Code project succeeds. (in-kernel
> alsa driver module for firewire audio)
>
>
> IOW: ship both stacks, decide for one and blacklist the other. FFADO
> users will then select the appropriate one. And of course, I'll continue
> looking into the FFADO-on-Juju issue.
>
>
>   
I asked an guy who did some work on the RT kernel for Ubuntu. This is 
what he said:

> 1) Ubuntu RT kernel don't offer the same guarantees that offer one of
> the Debian kernels. For example DOS vulnerabilities are accepted into
> Ubuntu RT Kernel (because it live in universe) when in Debian aren't
> accepted at all.
>
> 2) Kernel packages between Debian and Ubuntu are very different.
> Different version, different build infrastructure, different approach
> in accepting external sources. These packages are one of few packages
> that Ubuntu don't inherit from Debian.
>
> 3) Lenny is just released. I suppose that the next Debian release will
> probably be in two years. In meanwhile it is probably that almost rt
> bits will be merged and available in vanilla kernel (when it happen
> the rt kernel could became one of all kernel flavours that Debian
> offers).
>
> In other words a lot of effort is required for satisfy high quality
> requested by Debian policy.
Comments on this?

\r