Xenial and Cosmic already have commit 306d6c49ac9 via upstream stable updates.
I built a Bionic test kernel with commit 306d6c49ac9. The test kernel can be downloaded from: http://kernel.ubuntu.com/~jsalisbury/lp1800849 Can you test this kernel and see if it resolves this bug? Note about installing test kernels: • If the test kernel is prior to 4.15(Bionic) you need to install the linux-image and linux-image-extra .deb packages. • If the test kernel is 4.15(Bionic) or newer, you need to install the linux-modules, linux-modules-extra and linux-image-unsigned .deb packages. Thanks in advance! ** Changed in: linux (Ubuntu Xenial) Status: Triaged => Fix Released ** Changed in: linux (Ubuntu Bionic) Status: Triaged => In Progress ** Changed in: linux (Ubuntu) Status: Triaged => Fix Released -- 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/1800849 Title: [Ubuntu] kvm: fix deadlock when killed by oom Status in Ubuntu on IBM z Systems: Triaged Status in linux package in Ubuntu: Fix Released Status in linux source package in Xenial: Fix Released Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: Fix Released Bug description: Description: kvm: fix deadlock when killed by oom Symptom: oom killer leaves processes in a deadlock state. Problem: The problem arises in the rare cases in which handle_mm_fault does not release the mm_sem. Solution: Correct the issue by manually relaese the mm_sem when needed. Reproduction: Create numerous KVM guests so that the host starts swapping and memory becomes overcomitted and the oom killer is triggered. kernel 4.19 Upstream-ID: 306d6c49ac9ded11114cb53b0925da52f2c2ada1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1800849/+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
