When running this test on 3 concurrent VMs with this kernel this runs fine. With the ZFS backing store of the VMs set to sync on writes, I can slow the I/O and I get a lot of timeout issues which result in tests running for a long time and probably would get nuked by the testing infrastructure - see attached dmesg log for the timeouts.
I am currently speculating that the tests are failing because VFAT is sub-optimal compared to other file systems and with a slow backing store we may be just getting lockup warnings because of slow I/O write out and/or syncs. At least I have a reproducer. I don't think this is a critical show stopping bug. I will try and figure out what particular stress case is causing the issue, but this may take a while to iterate through. ** Attachment added: "dmesg log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1786462/+attachment/5173892/+files/dmesg.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1786462 Title: linux 4.17.0-7.8 ADT test failure with linux 4.17.0-7.8 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1786462/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
