Re: bpf selftests timer_lockup intermittently locks up kernel

Hello,

You may try netconsole to capture the crash log:

Reproducer Kernel config:
CONFIG_NETCONSOLE + CONFIG_NETCONSOLE_DYNAMIC=y 

Recv server:
run: nc -u -l -p 6666 | tee /tmp/klog.txt

Reproducer:

1. modprobe netconsole/or y(skip)
2. mount -t configfs none /sys/kernel/config or mounted(skip)
3. mkdir /sys/kernel/config/netconsole/target1
4. cd /sys/kernel/config/netconsole/target1
5. echo 192.168.1.10 > local_ip # 192.168.1.10 is reproducer ip
6. echo 6666 > local_port 
7. echo 6666 > remote_port
8. echo 192.168.1.20 > remote_ip $ recv ip
9. echo 1 > enabled
10. echo 8 > /proc/sys/kernel/printk
11. optional: echo xxx > /dev/kmsg to test 

BRs
Wentao Guan