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

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Artful:
  In Progress

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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