Public bug reported: KVM nesting support consumes too much memory When running KVM with nesting support (kvm.nested=1 on the kernel command line) the shadow page table code will produce too many entries in the shadow code.
There is an upstream fix that will prevent the majority of the problem: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a06afe8383080c630a7a528b8382fc6bb4925b61 The fix is needed for 20.04 and 22.04. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Skipper Bug Screeners (skipper-screen-team) Status: New ** Tags: architecture-s39064 bugnameltc-198271 severity-high targetmilestone-inin2004 ** Tags added: architecture-s39064 bugnameltc-198271 severity-high targetmilestone-inin2004 ** Changed in: ubuntu Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team) ** Package changed: ubuntu => linux (Ubuntu) -- 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/1974017 Title: [UBUNTU 20.04] KVM nesting support leaks too much memory, might result in stalls during cleanup Status in linux package in Ubuntu: New Bug description: KVM nesting support consumes too much memory When running KVM with nesting support (kvm.nested=1 on the kernel command line) the shadow page table code will produce too many entries in the shadow code. There is an upstream fix that will prevent the majority of the problem: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a06afe8383080c630a7a528b8382fc6bb4925b61 The fix is needed for 20.04 and 22.04. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1974017/+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
