This bug was fixed in the package linux-gke - 5.4.0-1101.108
---------------
linux-gke (5.4.0-1101.108) focal; urgency=medium
* focal/linux-gke: 5.4.0-1101.108 -proposed tracker (LP: #2022106)
* Packaging resync (LP: #1786013)
- [Packaging] resync git-ubuntu-log
* Severe NFS performance degradation after LP #2003053 (LP: #2022098)
- SAUCE: Make NFS file-access stale cache behaviour opt-in
-- Khalid Elmously <khalid.elmou...@canonical.com> Thu, 01 Jun 2023
16:22:47 -0400
** Changed in: linux-gke (Ubuntu Focal)
Status: Fix Committed => Fix Released
** Changed in: linux-gke (Ubuntu Jammy)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/2022098
Title:
Severe NFS performance degradation after LP #2003053
Status in linux package in Ubuntu:
Incomplete
Status in linux-gke package in Ubuntu:
New
Status in linux source package in Focal:
In Progress
Status in linux-gke source package in Focal:
Fix Released
Status in linux source package in Jammy:
In Progress
Status in linux-gke source package in Jammy:
Fix Released
Bug description:
The fix to LP #2003053 has caused massively increased NFS server
access in some use-cases, which caused severe performance degradation
to the point of being unusable in some cases.
The solution to this issue, at least temporarily and at least for
linux-gke, is to make the new behaviour optional using the
"nfs_fasc=1" module parameter. Without this parameter specified, (or
specified as =0) will keep the old behaviour.
Regresion potential:
- Regression potential is considered low considering the scope of the change
and is limited to NFS only.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2022098/+subscriptions
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