© 2004
Canonical Ltd.
•
Terms of use
•
Data privacy
•
Contact Launchpad Support
•
Blog
•
Careers
•
System status
•
73416ba
(Get the code!)
More tests on a bare-metal and a KVM node with 4.18.0-18 / -17 / -16 / -11 shows that:
* This issue can be reproduced on these kernels
* Bare metal system tend to pass with the ftrace test on the first run, but it will hang with the second / third attempt if you run it again
* KVM nodes tend to fail on the first attempt (3 out of 4 kernels), and if it has passed, the second attempt will reproduce this as well.
As the fact that the test tend to pass with the first attempt on bare metals, and we might just retry if has failed, I think all these combined leads to this situation.
For the patched kernel, I can re-run the ftrace test for 5 times without any interruptions on both of the bare-metal and the KVM node.
I will test Bionic next and prepare a SRU for Cosmic.