Ubuntu
linux-hwe package

test_maps from ubuntu_bpf failed with "FAIL:failed to create hashmap" on B-hwe i386

Bug #1837386 reported by Po-Hsu Lin
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ubuntu-kernel-tests
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linux-hwe (Ubuntu)
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Bionic
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Disco
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Bug Description

Test failed with:
  Fork 100 tasks to 'test_hashmap_walk'
  helper_fill_hashmap(270):FAIL:failed to create hashmap err: Cannot allocate memory, flags: 0x0
  ...
  Fork 100 tasks to 'test_hashmap_walk'
  test_maps: test_maps.c:1286: __run_parallel: Assertion `status == 0' failed.
  Fork 1024 tasks to 'test_update_delete'

Complete test log could be found here:
https://pastebin.ubuntu.com/p/nQBvZJH5Qb/

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.0.0-21-lowlatency 5.0.0-21.22~18.04.1
ProcVersionSignature: User Name 5.0.0-21.22~18.04.1-lowlatency 5.0.15
Uname: Linux 5.0.0-21-lowlatency i686
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: i386
Date: Mon Jul 22 11:30:53 2019
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)

Revision history for this message
Po-Hsu Lin (cypressyew) wrote :
tags: added: 5.0 sru-20190701 ubuntu-bpf
Po-Hsu Lin (cypressyew)
tags: added: sru-20190812
Steve Langasek (vorlon)
Changed in linux-hwe (Ubuntu Disco):
status: New → Won't Fix
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

Spotted on Bionic 5.4.0-42.46~18.04.1 node fozzie:

  Fork 100 tasks to 'test_hashmap_walk'
  helper_fill_hashmap(261):FAIL:failed to create hashmap err: Cannot allocate memory, flags: 0x0

tags: added: 5.4 sru-20200629
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

BTW
there is an error before this failure mentioned in comment #2:
  Fork 100 tasks to 'test_hashmap'
  test_maps: test_maps.c:1300: __run_parallel: Assertion `status == 0' failed

Maybe it's this failure that cause the "failed to create hashmap"

Please find attachment for the complete test log

Po-Hsu Lin (cypressyew)
summary: - test_maps from ubuntu_bpf failed on B-hwe i386
+ test_maps from ubuntu_bpf failed with "FAIL:failed to create hashmap" on
+ B-hwe i386
Revision history for this message
Luke Nowakowski-Krijger (lukenow) wrote (last edit ):

Very similar issue found on bionic/gcp-4.15 on 4.15.0-1109.123 only for n1-highcpu-4 instance.

18:45:34 DEBUG| Running './test_maps'
18:45:36 DEBUG| [stdout] Failed to create hashmap 'Cannot allocate memory'!
18:45:36 DEBUG| [stdout] Failed to create hashmap 'Cannot allocate memory'!
18:45:36 DEBUG| [stdout] Failed to create hashmap 'Cannot allocate memory'!
18:45:36 DEBUG| [stdout] Failed to create hashmap 'Cannot allocate memory'!
18:46:06 ERROR| [stderr] test_maps: test_maps.c:967: run_parallel: Assertion `status == 0' failed.

With the rest of the threads reporting the same error.

This issue also seems to be found in previous cycles on other instances as well.

Revision history for this message
Juerg Haefliger (juergh) wrote :

Also flaky with b/oracle and VM.Standard.E3.Flex-4c.8m instance types. That instance has 'only' 8GB so maybe at the hairy edge?

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