** Also affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-z-systems
Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)
** Changed in: ubuntu-z-systems
Importance: Undecided => Medium
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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 Ubuntu on IBM z Systems:
New
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-z-systems/+bug/1974017/+subscriptions
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