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Ubuntu 22.04 LTS & 20.04 LTS USN-6152-1: NFS Performance Issues

ubuntu
Calendar Grey June 8, 2023
Dist Ubuntu Esm H88
An acute decline in operational efficiency within the Linux kernel pertinent to GKE platforms may impact Ubuntu distributions 22.04 and 20.04.
The system could suffer with performance degradation in certain conditions.

Summary

The system could suffer with performance degradation in certain conditions.

Software Description:

- linux-gke: Linux kernel for Google Container Engine (GKE) systems

Details:

It was discovered that NFS client's access cache implementation in the

Linux kernel caused a severe NFS performance degradation in certain

conditions. This updated makes the NFS file-access stale cache behavior

to be optional.

Topics%20covered

Topics Covered

security advisory system update ubuntu kernel upgrade performance issue linux-gke nfs client

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1035-gke     5.15.0-1035.40
   linux-image-gke                 5.15.0.1035.34
   linux-image-gke-5.15            5.15.0.1035.34

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1101-gke      5.4.0-1101.108
   linux-image-gke                 5.4.0.1101.106
   linux-image-gke-5.4             5.4.0.1101.106

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-6152-1

https://bugs.launchpad.net/ubuntu/+source/linux-gke/+bug/2022098

Severity
critical
Lowest
Low
Medium
High
Critical

June 08, 2023

Topics%20covered

Topics Covered

security advisory system update ubuntu kernel upgrade performance issue linux-gke nfs client

Package Information

https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1035.40
https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1101.108

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