On 2025-03-21 12:03:10 [-0400], Gautam Thaker wrote: > I am currently running Armbian on rk3318 TV box. Runs great. > > rk3318-box> uname -a > Linux rk3318-box 6.12.19-current-rockchip64 #2 SMP PREEMPT Thu Mar 13 > 12:02:20 UTC 2025 aarch64 GNU/Linux > > My question: what is the quickest path to get FULL PREEMPT-RT kernel > running on my box? The easiest way should be simply enabling PREEMPT_RT on that kernel. > I believe I have found the Armbian sources. > (https://docs.armbian.com/Developer-Guide_Build-Preparation/) > > Are there instructions to build a kernel w/ all the same parameters as > a currently running kernel with only change to set FULL PREEMPT-RT ? I > would like to make least changes to configuration so that I may > continue to boot on my hardware. It is enough to just enable PREEMPT_RT. I would recommend to enable at least CONFIG_PROVE_LOCKING and CONFIG_DEBUG_ATOMIC_SLEEP in the beginning that there is nothing wrong in the kernel that nobody saw before. Once nothing pops up in the kernel log, then it could be turned off. > I used to make many RT kernels in the past, but not in the last 10 > years. I can't find current instructions. It was my understanding that > with 6.12+ linux kernel one needs NO RT patches, but still have to > config FULL PREEMPT-RT and build a new kernel. That is correct. > Or can I change some grub option and simply reboot my current kernel? No, that does not work. > Gautam > Sebastian
