On Thu, Dec 14, 2017 at 11:40 AM, Mirza Krak <mirza.k...@gmail.com> wrote:
> 2017-12-14 9:41 GMT+01:00 Andreas Müller <schnitzelt...@gmail.com>: > > On Thu, Dec 14, 2017 at 2:58 AM, Sherif Omran <sherifomran2...@gmail.com > > > > wrote: > >> > >> hey guys, > >> > >> any body tried the real time kernel? I get an error, it is snot in the > >> compatibility list. > >> can we skip it? > >> > >> thanks > >> > >> -- > > > > Good news: I use RT kernel only together with VC4 graphics and have lots > of > > fun on PI2/3. > > Bad news: As far as I know it is not in meta-raspberrypi but in my fork > [1]. > > There were attempts to land the RT-patches in meta-raspberrypi but that > was > > denied for huge patch size :( > > If the patch size was the only problem one can pull it by doing the > following in the recipe: > > SRC_URI += " \ > https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.9/ > patch-4.9.65-rt56.patch.gz;name=rt-patch > \ > " > > SRC_URI[rt-patch.md5sum] = "9caa7b541d8c84c2d5c5f58985982e95" > SRC_URI[rt-patch.sha256sum] = > "47dfb518c78d8cbaafd4ab9130eb26fe0170be9189b580ab26209ef679309539" > > Note that above sums are "random" and not the for the actually file > but are there for reference. > > That way you do not need to keep a copy of it in meta-raspberrypi. > > -- > Hi Mirza, Problem is that patches need alignments sometimes either caused by Raspberry-Pi-specific adjustments or versions not matching exactly - RT kernel patch updates are less frequent than kernel updates. Anyway: git is very good at maintaining huge text content and this should not be a problem these days. Another discussion about RT kernel was to have an extra kernel for it and I never understood why. To me that seems nothing but an extra maintenance burden. However - just wrote to Paul: I plan to be at FOSDEM and we can discuss there how to get back to one layer only (not mine!) making everybody happy :) Andreas
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