I'd like to perform a bisect to figure out what commit caused this regression. We need to identify the earliest kernel where the issue started happening as well as the last kernel that did not have this issue.
Can you test the following kernels and report back? We are looking for the first kernel version that exhibits this bug: 4.5 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-wily/ 4.8 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8/ 4.10 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10/ You don't have to test every kernel, just up until the kernel that first has this bug. Thanks in advance! ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Also affects: linux (Ubuntu Cosmic) Importance: High Status: Confirmed ** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Bionic) Importance: Undecided => High ** Changed in: linux (Ubuntu Bionic) Status: New => Incomplete ** Changed in: linux (Ubuntu Cosmic) Status: Confirmed => Incomplete ** Changed in: linux (Ubuntu Bionic) Status: Incomplete => Triaged ** Changed in: linux (Ubuntu Cosmic) Status: Incomplete => Triaged ** Changed in: linux (Ubuntu Bionic) Assignee: (unassigned) => Joseph Salisbury (jsalisbury) ** Changed in: linux (Ubuntu Cosmic) Assignee: (unassigned) => Joseph Salisbury (jsalisbury) -- 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/1778717 Title: Ubuntu 18.04 guest hangs during diskio stress Status in dellserver: New Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Triaged Status in linux source package in Cosmic: Triaged Bug description: Setup - A Dell EMC 14th Gen AMD server, with ESXi 6.7 as host and Ubuntu 18.04 (latest updates) guest. Guest has 3 data disks apart from the boot disk. All these disks are exposed through "ParaVirtual SCSI controller" from the host ESXi 6.7. Run diskio stress on all the 3 data disks for overnight. Guest goes unresponsive (even ping fails) in between. Only way to recover is to reset the guest. Logs do not indicate much on this error. Rarely we get a crash on the Guest-screen. Attaching 2 screenshots of different hits. We have tried mainline kernel v4.18-rc-2 and have hit the issue there as well. Changing the SCSI controller to "LSI Logic SAS adapter" helps and we have not seen any crash/hang here. To manage notifications about this bug go to: https://bugs.launchpad.net/dellserver/+bug/1778717/+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
