[yocto] Current state of linux-raspberrypi-rt?

Paul D. DeRocco pderocco at ix.netcom.com
Mon Jun 26 00:42:48 PDT 2017

> From: Trevor Woerner [mailto:twoerner at gmail.com] 
> > Google turns up a lot of stuff about this, but the latest I 
> > found was a
> > thread from 1/5/17 that started with Trevor Woerner posting 
> > a 1MB patch,
> > and that ended with him posting a message saying that it 
> > didn't actually work.
> I posted a v1, which worked great, and continues to work great.
> After posting the v1, lots of feedback was given. One of those pieces
> of feedback was that I shouldn't include the entire defconfig, but
> rather I should use some sort of "savedconfig" setting to generate the
> full config. I had never heard of this before. I asked for more
> clarification but received none. I went ahead with the v2 using this
> "savedconfig" technique. It *appeared* to work (which is why I
> submitted the update to the mailing list), but, after a lot of
> testing, I discovered that this "savedconfig" thing didn't work. The
> defconfig that was generated using this technique was useless and
> nobody could provide any reason why or advice how to fix it.
> So v2 didn't work, but v1 did and still does (we're using it 
> internally).
> But everyone considered v1 to not be acceptable for inclusion for a
> number of reasons, so it never got merged. Besides, that work was for
> a 4.4 kernel, which is now considered "old".
> > Is there anything new on this? I'm trying to do some 
> > compute-intensive
> > audio on an RPi3, and it really needs a real-time kernel.
> Andreas Müller has a meta-raspberrypi fork in which he has an -rt
> recipe for a 4.9 kernel:
> https://github.com/schnitzeltony/meta-raspi-light

Thanks to you and Andreas for doing this.


Ciao,               Paul D. DeRocco
Paul                mailto:pderocco at ix.netcom.com

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