That is great news. That means the fix in mainline was already cc'd to upstream stable. Xenial will get the fix through the normal upstream stable update process.
If you want to, we can still perform a kernel bisect to identify the fix for this bug, but that will require testing about 10 test kernels. Or we can just wait for the fix to come down via updates. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1602577 Title: [arm64] compute nodes unstable after upgrading from 4.2 to 4.4 kernel Status in linux package in Ubuntu: In Progress Status in linux source package in Xenial: In Progress Bug description: Hi, In order to investigate bug LP#1531768, we upgraded some arm64 compute nodes (swirlices) to a 4.4 kernel. I think it made the VMs work better, but the hosts became extremely unstable. After some time, getting a shell on them would be impossible. Connecting on the VSP, you'd get a prompt, and once you typed your username and password, you'd see the motd but the shell would never spawn. Because of these instability issues, all the arm64 compute nodes are now back on 4.2. However, we managed to capture "perf record" data when a host was failing. I'll attach it to the bug. Perhaps it will give you hints as to what we can do to help you troubleshoot this bug further. Once we have your instructions, we'll happily reboot one (or a few) nodes to 4.4 to continue troubleshooting. Thanks ! --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Jul 12 12:54 seq crw-rw---- 1 root audio 116, 33 Jul 12 12:54 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.14.1-0ubuntu3.21 Architecture: arm64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory DistroRelease: Ubuntu 14.04 Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99 Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=screen-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: console=ttyS0,9600n8r ro compat_uts_machine=armv7l ProcVersionSignature: Ubuntu 4.2.0-41.48~14.04.1-generic 4.2.8-ckt11 RelatedPackageVersions: linux-restricted-modules-4.2.0-41-generic N/A linux-backports-modules-4.2.0-41-generic N/A linux-firmware 1.127.22 RfKill: Error: [Errno 2] No such file or directory Tags: trusty uec-images Uname: Linux 4.2.0-41-generic aarch64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1602577/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp