开云体育

Hi Jon,

The Pi-1 crashed on its own today without the beacon app, after 1d 3h 47m uptime.? Here is what it cried out when going down.
[100075.375841] CPU: 0 PID: 3001 Comm: netstat Tainted: G???????? C???????? 6.1.0-rpi7-rpi-v6 #1? Raspbian 1:6.1.63-1+rpt1

Thanks for sharing this; this is very interesting. ?It shows that the crash can move from one user space app to another. ?It also proves the theory that we can't work around this by disabling beacons or turning off Pat; the crash will just be triggered by something else.

I agree that netstat is going to walk the kernel AX.25 memory structures, even if it's not directly related to other ax25-tools. ?Regarding rmsgw_aci, if you know what time of day the Pi crashed, I bet it matches your rmsgw_aci schedule in cron.

We're collecting quite a few variables to test here.? This could take a while if crashes only happen every few days.
32 or 64 bit?
Bullseye or Bookworm?
How many ax25 packets until the system becomes unstable?
Beacon or no-beacon?

Here's my feed back. ?I'm all 64-bit and all Bookworm. ?I also moved beacon to the TNC (Direwolf), but, as I think this crash proves, beacon is just a red-herring.

So, on the packet question, I'm going to retract my earlier statement that a certain amount of traffic is required.

I started thinking about this last night and was disappointed that there wasn't a common way we could test out our builds. ?I did, however, remember something from the Direwolf user's guide. ?WB2OSZ used a set of test audio to tune the Direwolf algorithms, and that gave me an idea. ?I tracked down the ?and extracted an AIFF file. ?Then I built a loop to continuously play this test audio through the on-board Pi headphone jack. ?I connected the headphone back back to a USB audio adapter and configured Direwolf to decode the audio back into the AX.25 stack.

I've had this setup running for about 2 days now. ?No crash thus far, but I've looped about 70,000 AX.25 packets (4.3MByte), which is probably more data than my station would see in 6 months: