SRU request submitted:
https://lists.ubuntu.com/archives/kernel-team/2018-March/090701.html
** Description changed:
- 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.
+ == 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
+ 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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https://bugs.launchpad.net/bugs/1748408
Title:
Servers going OOM after updating kernel from 4.10 to 4.13
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