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Message #26852
[Bug 1800849] Re: [Ubuntu] kvm: fix deadlock when killed by oom
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Status: New => Triaged
** Changed in: linux (Ubuntu)
Assignee: Skipper Bug Screeners (skipper-screen-team) => Joseph Salisbury (jsalisbury)
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Status: New => Triaged
** Changed in: linux (Ubuntu Bionic)
Status: New => Triaged
** Changed in: linux (Ubuntu Cosmic)
Status: New => Triaged
** Changed in: linux (Ubuntu Xenial)
Importance: Undecided => High
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => High
** Changed in: linux (Ubuntu Cosmic)
Importance: Undecided => High
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
** Changed in: linux (Ubuntu Cosmic)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
** Changed in: linux (Ubuntu Cosmic)
Status: Triaged => Fix Released
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Matching subscriptions: Ubuntu 16.04 Bugs
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