** Changed in: linux (Ubuntu Jammy)
Assignee: (unassigned) => Frank Heimes (fheimes)
** Changed in: ubuntu-z-systems
Status: New => In Progress
** Changed in: linux (Ubuntu Jammy)
Status: New => In Progress
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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:
In Progress
Status in linux package in Ubuntu:
New
Status in linux source package in Focal:
New
Status in linux source package in Impish:
New
Status in linux source package in Jammy:
In Progress
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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