clone test from ubuntu_stress_smoke_test failed on B-hwe 5.0 i386

[Po-Hsu Lin]

Reproduce rate: 2/2

Issue found on an i386 node pepe with B-hwe 5.0.

It looks like the clone test haven't pass successfully.
  Setting up swapspace version 1, size = 1024 MiB (1073737728 bytes)
  no label, UUID=25a57478-f726-411c-b79e-05d18c1cc5b2

  Machine Configuration
  Physical Pages: 2046087
  Pages available: 1518620
  Page Size: 4096
  Zswap enabled: Y

  Free memory:
                total used free shared buff/cache available
  Mem: 8184348 185048 6074228 932 1925072 7348440
  Swap: 5242872 0 5242872

  Number of CPUs: 8
  Number of CPUs Online: 8

  access STARTING
  access RETURNED 0
  access PASSED
  af-alg STARTING
  af-alg RETURNED 0
  af-alg PASSED
  affinity STARTING
  affinity RETURNED 0
  affinity PASSED
  aio STARTING
  aio RETURNED 0
  aio PASSED
  aiol STARTING
  aiol RETURNED 0
  aiol PASSED
  bad-altstack STARTING
  bad-altstack RETURNED 0
  bad-altstack PASSED
  bigheap STARTING
  bigheap RETURNED 0
  bigheap PASSED
  branch STARTING
  branch RETURNED 0
  branch PASSED
  brk STARTING
  brk RETURNED 0
  brk PASSED
  cache STARTING
  cache RETURNED 0
  cache PASSED
  cap STARTING
  cap RETURNED 0
  cap PASSED
  chdir STARTING
  chdir RETURNED 0
  chdir PASSED
  chmod STARTING
  chmod RETURNED 0
  chmod PASSED
  chown STARTING
  chown RETURNED 0
  chown PASSED
  chroot STARTING
  chroot RETURNED 0
  chroot PASSED
  clock STARTING
  clock RETURNED 0
  clock PASSED
  clone STARTING
  clone RETURNED 0
  stderr:
  1024+0 records in
  1024+0 records out
  1073741824 bytes (1.1 GB, 1.0 GiB) copied, 5.43609 s, 198 MB/s
12:03:16 INFO | END ERROR ubuntu_stress_smoke_test.stress-smoke-test ubuntu_stress_smoke_test.stress-smoke-test timestamp=1569844996 localtime=Sep 30 12:03:16
12:03:16 DEBUG| Persistent state client._record_indent now set to 1
12:03:16 DEBUG| Persistent state client.unexpected_reboot deleted

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1845948

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Colin Ian King (colin-king)]

I've managed to reproduce this on pepe, seems like the autotest is being OOM'd in preference to the actual cloning processes. I'll see if I can figure out how to stop this.

[Colin Ian King (colin-king)]

Fixes committed to make the clone test more OOM-able and the autotest less OOM-able:

https://kernel.ubuntu.com/git/cking/stress-ng.git/commit/?id=f37bba3874b1e613f307cb40c040e06f21b1e521
https://kernel.ubuntu.com/git/cking/stress-ng.git/commit/?id=cdd32c1c25b9c7f11be4778cd99b7c45f6f9d51d

and

https://kernel.ubuntu.com/git/ubuntu/autotest-client-tests.git/commit/?id=7447c7b658e3a6cc40496a75033c007e4a91f166

[Po-Hsu Lin (cypressyew)]

Retested with the same jenkins job, now node pepe will pass with this test, thanks.