------- Comment From atraj...@in.ibm.com 2018-10-12 05:58 EDT------- Thanks for the update. Please find the response below.
1. The issue is reproducible on below versions of kernel: 4.15.0-36.39 4.15.0-35.38 4.15.0-33.36 4.15.0-20.21 Also the panic is reproducible on z14 machine. We will re run with kernel 4.15.0-38.41 and update the results here 2. With respect to what userspace application triggering happens during the panic, this issue occurs during stress tests on network bonding and at a high level , the set of operations are as below: # Create bond for which slaves are already configured # Try to create bond for a slave with wrong port number. ( Failure test case scenario ) # Delete the created bond The test infrastructure uses REST requests and we have collected the coredump files through nmcli commands along with other operations. As mentioned already in this bugzilla, since crash dump was huge to be added as bugzilla attachment, results of few crash commands like bt, log only were added in the Attachment. One other observation is, at the time of the crash observed that the gzip tool is running with high cpu consumption reported through top. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 191999 root 20 0 2424 1424 1152 R 100.0 0.0 0:37.86 gzip PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 68704 root 20 0 2424 1424 1152 R 93.8 0.0 0:41.97 gzip Will respond back with testing results on 4.15.0-38.41 and a reduced set of exact test scenario. Meanwhile, please let me know where to upload the dump files and sosreport to help in further analysis -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1797367 Title: Ubuntu 18.04.1 - [s390x] Kernel panic while stressing network bonding To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1797367/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
