Hi everyone, i'm using a rpi0/archlinuxarm for drone control that's why i need a real time kernel.
I've been manually making the linux-raspberrypi package (https://github.com/archlinuxarm/PKGBUILDs/tree/master/core/linux-raspberrypi) so i could patch it with the corresponding RT patches. (https://www.kernel.org/pub/linux/kernel/projects/rt/).
This have been working perfectly for me until the 4.9 kernel brach that freezes instantly under heavy cpu load only if a usb hub is connected, no matter the number of usb devices conected to it or if it is a powered hub or not, the rpi0 just freezes without printing a line so i'm unable to provide any logs.
I can confirm it's happening the latest kernel 4.9.13-2 too
I'm stuck in the last 4.4 brach kernel (4.4.49-1) until that problem is fixed