Comment 0 for bug 1798566

On a ThunderX Cavium ARM64 node, with kernel: 4.15.0-36-generic #39~16.04.1-Ubuntu
and the proposed 4.15.0-38-generic #41~16.04.1-Ubuntu

The revio test in ubuntu_stress_smoke_test will fail with:

 revio STARTING
  revio RETURNED 2
  revio FAILED
  stress-ng: debug: [4771] 48 processors online, 48 processors configured
  stress-ng: info: [4771] dispatching hogs: 4 revio
  stress-ng: info: [4771] cache allocate: using built-in defaults as unable to determine cache details
  stress-ng: debug: [4771] cache allocate: default cache size: 2048K
  stress-ng: debug: [4771] starting stressors
  stress-ng: debug: [4772] stress-ng-revio: started [4772] (instance 0)
  stress-ng: debug: [4773] stress-ng-revio: started [4773] (instance 1)
  stress-ng: debug: [4771] 4 stressors spawned
  stress-ng: debug: [4774] stress-ng-revio: started [4774] (instance 2)
  stress-ng: debug: [4775] stress-ng-revio: started [4775] (instance 3)
  stress-ng: fail: [4774] (null): open failed, errno=2 (No such file or directory)
  stress-ng: fail: [4775] (null): open failed, errno=2 (No such file or directory)
  stress-ng: fail: [4774] (null): rmdir './tmp-(null)-0-6' failed, errno=2 (No such file or directory)
  stress-ng: fail: [4775] (null): rmdir './tmp-(null)-0-6' failed, errno=2 (No such file or directory)
  stress-ng: fail: [4773] (null): rmdir './tmp-(null)-0-6' failed, errno=2 (No such file or directory)
  stress-ng: fail: [4772] (null): rmdir './tmp-(null)-0-6' failed, errno=2 (No such file or directory)
  stress-ng: debug: [4771] process [4772] (stress-ng-revio) terminated on signal: 6 (Aborted)
  stress-ng: debug: [4771] process [4772] terminated
  stress-ng: debug: [4771] process [4773] (stress-ng-revio) terminated on signal: 6 (Aborted)
  stress-ng: debug: [4771] process [4773] terminated
  stress-ng: debug: [4771] process [4774] (stress-ng-revio) terminated on signal: 6 (Aborted)
  stress-ng: debug: [4771] process [4774] terminated
  stress-ng: debug: [4771] process [4775] (stress-ng-revio) terminated on signal: 6 (Aborted)
  stress-ng: debug: [4771] process [4775] terminated
  stress-ng: info: [4771] unsuccessful run completed in 0.76s

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.15.0-36-generic 4.15.0-36.39~16.04.1
ProcVersionSignature: User Name 4.15.0-36.39~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-36-generic aarch64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: arm64
Date: Thu Oct 18 09:08:59 2018
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)