Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.3 kernel[0].
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-rc3-unstable/ ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Tags added: kernel-da-key vivid -- 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/1500739 Title: CPU lockup on HP Proliant DL380 Gen9 servers Status in linux package in Ubuntu: Incomplete Bug description: Over the past 3-ish weeks we've had 3 seperate HP Proliant DL380 Gen9 servers lock up with a similar looking cpu lockup bug. All 3 of these servers are nova-compute nodes in an OpenStack cluster, with a reasonable amount of load on them. The symptoms are the load shoots up into the hundreds, and ps stops returning. I've attached lspci -vnvn and 3 sets of syslog message traces that we grabbed on each of the 3 times it has crashed. $ cat /proc/version_signature Ubuntu 3.16.0-49.65~14.04.1-generic 3.16.7-ckt15 Please let us know if you need any further information. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1500739/+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
