** Changed in: linux-kvm (Ubuntu Focal)
Status: Triaged => Fix Committed
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https://bugs.launchpad.net/bugs/1881346
Title:
linux-kvm should support nftables
Status in linux-kvm package in Ubuntu:
Invalid
Status in linux-kvm source package in Focal:
Fix Committed
Bug description:
[Impact]
LXD can't use nftables on the latest Focal/linux-kvm kernel, since
nftables support is off (contrary to generic, where nftables is
enabled).
[Fix]
Apply the attached config change
[Regression potential]
Low, we are enabling CONFIG_NF* options widely used in generic since a
while.
Boot performance wise, the config change has been tested on a isolated
KVM instance, iterating over 100 reboots and we didn't notice any
evident regression:
5.4.0-1018-kvm 20.04 focal (CPUS=1):
kernel: 2.16371, user: 7.58647, total: 9.75018
kernel_std: .03405, user_std: .33445, total_std: .33524
5.4.0-1018-kvm~nft 20.04 focal (CPUS=1):
kernel: 2.15961, user: 7.63694, total: 9.79655
kernel_std: .03420, user_std: .36585, total_std: .37049
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LXD can't use nftables on the latest linux-kvm kernels for eoan, focal, and
groovy:
- groovy: 5.4.0.1009.9
- focal: 5.4.0-1011.11
- eoan: 5.3.0.1017.19
LXD detects that nft tools are available, and nft tables can be
listed; however, trying to create a new table or rule fails.
Because of this, LXD has to fall back on xtables, which is a legacy
package.
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