The Ubuntu-power-systems project

  1. Bug #1927076
  2. Comment #2

Comment 2 for bug 1927076

Revision history for this message
Po-Hsu Lin (cypressyew) wrote : Re: IPv6 TCP in reuseport_bpf_cpu from ubuntu_kernel_selftests/net tend to fail on P8 node entei with 5.8 kernel

It looks like this test will cause system reboot, without suspicious error messages in syslog

ubuntu@entei:~/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/net$ sudo ./reuseport_bpf_cpu
....
send cpu 125, receive socket 125
send cpu 127, receive socket 127
---- IPv6 TCP ----
packet_write_wait: Connection to 10.245.71.180 port 22: Broken pipe
(system rebooted)

In syslog:
ay 5 06:09:30 entei systemd[1]: motd-news.service: Succeeded.
May 5 06:09:30 entei systemd[1]: Finished Message of the Day.
May 5 06:09:31 entei systemd[1]: apt-daily-upgrade.service: Succeeded.
May 5 06:09:31 entei systemd[1]: Finished Daily apt upgrade and clean activities.
May 5 06:14:32 entei PackageKit: daemon quit
May 5 06:14:32 entei systemd[1]: packagekit.service: Succeeded.
May 5 06:14:53 entei ntpd[42145]: kernel reports TIME_ERROR: 0x2041: Clock Unsynchronized
May 5 06:15:12 entei systemd[1]: Started Session 4 of user ubuntu.
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@May 5 06:21:15 entei systemd-sysctl[1479]: Not setting net/ipv4/conf/all/promote_secondaries (explicit setting exists).
May 5 06:21:15 entei systemd-sysctl[1479]: Not setting net/ipv4/conf/default/promote_secondaries (explicit setting exists).
May 5 06:21:15 entei lvm[1468]: /dev/sdc: open failed: No medium found

System rebooted around 06:15:12

This can be reproduced with 5.8.0-50-generic as well.