Some good news: With bug 1534545 fixed I was now able to upgrade to the Xenial 4.4 kernel. On the 4x CPU instance two parallel adt-run loops have now run for about two hours without any dmesg spew. Stéphane has run "lxc-test-concurrent -j 16 -i 10" twice on the 8x CPU instance successfully too.
Bad news: I rebooted the 8x CPU instance (also xenial du jour with 4.4 kernel), and didn't do anything on it. After just sitting idle for an hour or two ssh stopped responding and nova console-log shows http://paste.ubuntu.com/14857144/ (only a hard reboot helped). So it wet its pants without actually doing any action. So it appears it's not fully fixed yet, but muuch better. I'll do some more smoke testing, and if 4x CPU instances work, this is good enough to put this into production. I'll keep the old Calxeda instances alive as a fallback for a while, of course. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1531768 Title: [arm64] multithreaded processes get locked up in futexes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1531768/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
