[yocto] [meta-raspberrypi] linux kernel rt

[Andreas Müller]

On Fri, Jan 26, 2018 at 3:09 PM, Trevor Woerner <twoerner at gmail.com> wrote:
> On Fri, Jan 26, 2018 at 3:43 AM, Martin Hundebøll
> <martin.hundeboll at prevas.dk> wrote:
>>
>>
>>
>> On 2018-01-26 04:51, Khem Raj wrote:
>>>
>>>
>>> Secondly, I wonder how good is upstream mainline kernel for rpi now a
>>> days, we could always have a mainline recipe as an option and use it as base
>>> for things like rt.
>>
>>
>> Apart from runtime device tree overlay support for RPi hats/extension
>> boards, mainline linux fully supports each RPi revision.
>>
>> I guess linux-yocto-rt would be just fine...
>>
>
> Does anyone know if the FIQ bug has been fixed upstream? The last time I
> looked into PREEMPT_RT on the RPi, the only way to make it work/stable was
> to patch the FIQ issue, or disable FIQ altogether (not ideal). This patch
> was outside both the kernel and the PREEMPT_RT patch.
>
> --
Seems RPi.org made some progress on this[1].

If I only had some time left to give this a try...

[1] https://github.com/raspberrypi/linux/issues/2244#issuecomment-369597357

Andreas