lxc-test-device-add-remove from ubuntu_lxc failed on B-5.4

[Po-Hsu Lin]

Issue found on with 5.4.0-1016.16~18.04.1-oracle on both VM.Standard2.1 and VM.Standard2.16

Test failed with:
 FAIL: lxc-tests: lxc-test-device-add-remove (1s)
 ---
 Adding /dev/network_latency to the container (device_add_remove_test) failed...

This issue can be found on oracle : 5.4.0-1011.11~18.04.1 on VM.Standard2.16 but passed on VM.Standard2.1

[Po-Hsu Lin (cypressyew)]

This issue does not exist on Focal 5.4.0-1011.11, 5.4.0-1012.12, 5.4.0-1016.16 Oracle.

[Po-Hsu Lin (cypressyew)]

Issue spotted on B-5.4 Azure as well.

[Po-Hsu Lin (cypressyew)]

Can be found on Bionic 5.4.0-42.46~18.04.1 as well.

[Francis Ginther (fginther)]

Seen with Bionic 5.4.0-1026.26~18.04.1 and 5.4.0-1025.25~18.04.1.

[Francis Ginther (fginther)]

Seen with Bionic 5.4.0-1026.26~18.04.1 and 5.4.0-1025.25~18.04.1 AWS.

[Kelsey Steele (kelsey-steele)]

Failed on Bionic/oracle : 5.4.0-1026.26~18.04.1 : amd64

[Po-Hsu Lin (cypressyew)]

Syslog output on node gummo (5.4.0-60-generic #67~18.04.1)

[Po-Hsu Lin (cypressyew)]

Test output on node gummo (5.4.0-60-generic #67~18.04.1)

[Po-Hsu Lin (cypressyew)]

https://github.com/lxc/lxc/issues/3616

[Christian Brauner (cbrauner)]

This has been fixed a long while ago:

commit 920cbb00268ce50d1306daebb74871f66583a46c
Author: Christian Brauner <email address hidden>
Date: Mon Nov 18 15:08:22 2019 +0100

    tests: use /dev/loop-control instead of /dev/network_latency

    BugLink: https://bugs.launchpad.net/bugs/1848587

    The latter device has been removed apparently.

which is also backported stable-3.0. So Stéphane just needs to cut a new stable point release.

[Ian May (ian-may)]

bionic/linux-azure 5.4.0-1047.49~18.04.1 sru-20210412

[Kleber Sacilotto de Souza (kleber-souza)]

Spotted also with bionic/linux-hwe-5.4 5.4.0-73.82~18.04.1.

[Ian May (ian-may)]

bionic/linux-gke-5.4: 5.4.0-1043.45~18.04.1

[Ian May (ian-may)]

bionic/linux-oracle-5.4: 5.4.0-1044.47~18.04.1

[Guilherme G. Piccoli (gpiccoli)]

Observed with B-5.4/aws, cycle sru-20210531 .