I have found the cause.
It was running the cgm command from cgroup-lite package.
But during the last SRU cycle, it got replaced by cgmanager package.
If you switch to the cgroup-lite, the SUT will pass with this test.
** Summary changed:
- lxc-test-unpriv test failed on s390x instances
+ lxc-test-unpriv test failed on s390x instances with cgmanager
** Description changed:
- Update: this can be reproduced with kernel downgraded to 4.4.0-98, see
+ Update2: Switching from cgroup-lite to cgmanager will trigger this
+ failure, see comment #4
+
+ Update1: this can be reproduced with kernel downgraded to 4.4.0-98, see
comment #1
This test has passed with older kernels (4.4.0-98, 4.4.0-97, 4.4.0-96), but
this time it failed.
Issue can be seen on zKVM, zVM and Ubuntu on LPAR
Steps:
1. Install lxc-tests
2. Run sudo /usr/bin/lxc-test-unpriv
Result:
---
mount: wrong fs type, bad option, bad superblock on none,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
umount: /tmp/tmp.uMnoGYXJSH/ovl_symlink_test/overlayfs: not mounted
/usr/sbin/deluser: The user `lxcunpriv' does not exist.
Path existed
Using image from local cache
Unpacking the rootfs
---
You just created an Ubuntu container (release=xenial, arch=s390x,
variant=default)
To enable sshd, run: apt-get install openssh-server
For security reason, container images ship without user accounts
and without a root password.
Use lxc-attach or chroot directly into the rootfs to set a root password
or create user accounts.
Name: c1
State: RUNNING
PID: 5846
CPU use: 0.05 seconds
BlkIO use: 0 bytes
Memory use: 10.04 MiB
KMem use: 0 bytes
Link: vethV2EVRI
TX bytes: 0 bytes
RX bytes: 0 bytes
Total bytes: 0 bytes
Name: c1
State: RUNNING
PID: 6218
CPU use: 0.03 seconds
BlkIO use: 0 bytes
Memory use: 1.50 MiB
KMem use: 0 bytes
Link: vethA54DMR
TX bytes: 0 bytes
RX bytes: 0 bytes
Total bytes: 0 bytes
Testing containers under different cgroups per subsystem
call to cgmanager_move_pid_main_sync failed: invalid request
c2 is not running
c1 is not running
Removing user `lxcunpriv' ...
Warning: group `lxcunpriv' has no more members.
Done.
FAIL
---
The mount error (bug 1730915) is not the cause, it looks like the failure was
caused by:
call to cgmanager_move_pid_main_sync failed: invalid request
In that shell script, this line account for the error:
cgm movepid freezer x1 $$
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-100-generic 4.4.0-100.123
ProcVersionSignature: Ubuntu 4.4.0-100.123-generic 4.4.95
Uname: Linux 4.4.0-100-generic s390x
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code
2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: s390x
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
Date: Wed Nov 8 04:39:12 2017
HibernationDevice: RESUME=UUID=ca468a9c-9563-442c-85c6-6055e800a66e
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lspci:
Lsusb: Error: command ['lsusb'] failed with exit code 1:
PciMultimedia:
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C
SHELL=/bin/bash
ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
ProcKernelCmdLine: root=UUID=b65b756a-ba4e-4c53-aa32-0db2bdb50bb3
crashkernel=196M
RelatedPackageVersions:
linux-restricted-modules-4.4.0-100-generic N/A
linux-backports-modules-4.4.0-100-generic N/A
linux-firmware 1.157.13
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
** Also affects: cgmanager (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1730926
Title:
lxc-test-unpriv test failed on s390x instances with cgmanager
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