** Changed in: linux (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1748408
Title:
Servers going OOM after updating kernel from 4.10 to 4.13
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Artful:
Fix Released
Bug description:
== SRU Justification ==
We are seeing this on multiple servers after upgrading from previous 4.10
series HWE kernels to the new 4.13 HWE series. With the new kernel, free memory
is continously decreasing at a high rate and the servers start swapping and
finally OOMing services within days. With the 4.10 kernel, decrease of free
memory is slower and stabilizes after a while.
Latest kernel tested is linux-image-4.13.0-32-generic but the issue
also affects older kernels from that series, tested back to linux-
image-4.13.0-19-generic. No issue with linux-image-4.10.0-42-generic.
The servers are running as OpenStack controller nodes using either
Ocata or Pike UCA plus ceph. See attached graph for the memory
behaviour.
== Fix ==
2b9478ffc550("i40e: Fix memory leak related filter programming status")
62b4c6694dfd("i40e: Add programming descriptors to cleaned_count")
== Regression Potential ==
Low. Limited to i40e and fix existing regression.
== Test Case ==
A test kernel was built with these patches and tested by the original bug
reporter.
The bug reporter states the test kernel resolved the bug.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.13.0-32-generic 4.13.0-32.35~16.04.1
ProcVersionSignature: Ubuntu 4.13.0-32.35~16.04.1-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
Date: Fri Feb 9 09:45:50 2018
ProcEnviron:
LANGUAGE=en_US:
TERM=screen
PATH=(custom, no user)
LANG=en_US.utf8
SHELL=/bin/bash
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)
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