** Changed in: linux (Ubuntu Artful)
       Status: In Progress => Fix Committed

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  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:
  Fix Committed

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

  == 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 
  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
   PATH=(custom, no user)
  SourcePackage: linux-hwe
  UpgradeStatus: No upgrade log present (probably fresh install)

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