Public bug reported: This issue can be spotted on s390x, ARM64 and AMD64 Artful kernel.
10:02:39 DEBUG| [stdout] sigpending STARTING 10:02:44 DEBUG| [stdout] sigpending RETURNED 0 10:02:44 DEBUG| [stdout] sigpending PASSED 10:02:44 DEBUG| [stdout] sigpipe STARTING 10:02:49 DEBUG| [stdout] sigpipe RETURNED 0 10:02:49 DEBUG| [stdout] sigpipe PASSED 10:02:49 DEBUG| [stdout] sigq STARTING ... This is the last entry related to stress-ng in syslog of a s390x node: May 31 10:46:39 s2lp6g004 stress-ng: system: 's2lp6g004' Linux 4.13.0-45-generic #50-Ubuntu SMP Wed May 30 08:21:19 UTC 2018 s390x May 31 10:46:39 s2lp6g004 stress-ng: memory (MB): total 1805.91, free 1409.97, shared 6.06, buffer 134.56, swap 2001.63, free swap 1890.19 May 31 10:46:39 s2lp6g004 stress-ng: info: [20125] dispatching hogs: 4 sigq No more stress-ng related message after this. ubuntu@s2lp6g004:/tmp$ cat stress-9234.log stress-ng: debug: [20125] 2 processors online, 2 processors configured stress-ng: info: [20125] dispatching hogs: 4 sigq stress-ng: debug: [20125] cache allocate: reducing cache level from L3 (too high) to L2 stress-ng: debug: [20125] cache allocate: default cache size: 2048K stress-ng: debug: [20125] starting stressors stress-ng: debug: [20126] stress-ng-sigq: started [20126] (instance 0) stress-ng: debug: [20125] 4 stressors spawned stress-ng: debug: [20129] stress-ng-sigq: started [20129] (instance 3) stress-ng: debug: [20128] stress-ng-sigq: started [20128] (instance 2) stress-ng: debug: [20127] stress-ng-sigq: started [20127] (instance 1) stress-ng: debug: [20126] stress-ng-sigq: parent sent termination notice stress-ng: debug: [20130] stress-ng-sigq: child got termination notice ubuntu@s2lp6g004:/tmp$ ps aux | grep stress-ng root 5948 0.0 0.0 11456 712 ? S May31 0:00 ./stress-ng -v -t 5 --enosys 4 --ignite-cpu --syslog --verbose --verify --oomable root 7654 0.0 0.0 11456 712 ? S May31 0:00 ./stress-ng -v -t 5 --enosys 4 --ignite-cpu --syslog --verbose --verify --oomable root 7728 0.0 0.0 11456 712 ? S May31 0:00 ./stress-ng -v -t 5 --enosys 4 --ignite-cpu --syslog --verbose --verify --oomable root 7740 0.0 0.0 11456 712 ? S May31 0:00 ./stress-ng -v -t 5 --enosys 4 --ignite-cpu --syslog --verbose --verify --oomable root 20125 0.0 0.2 13612 5008 ? SL May31 0:00 ./stress-ng -v -t 5 --sigq 4 --ignite-cpu --syslog --verbose --verify --oomable root 20126 1.0 0.1 13612 1852 ? S May31 12:03 ./stress-ng -v -t 5 --sigq 4 --ignite-cpu --syslog --verbose --verify --oomable root 20127 1.0 0.1 13612 1852 ? S May31 12:11 ./stress-ng -v -t 5 --sigq 4 --ignite-cpu --syslog --verbose --verify --oomable root 20128 1.0 0.1 13612 1852 ? S May31 12:04 ./stress-ng -v -t 5 --sigq 4 --ignite-cpu --syslog --verbose --verify --oomable root 20129 1.0 0.1 13612 1852 ? S May31 12:06 ./stress-ng -v -t 5 --sigq 4 --ignite-cpu --syslog --verbose --verify --oomable root 20131 0.0 0.0 13612 312 ? S May31 0:00 ./stress-ng -v -t 5 --sigq 4 --ignite-cpu --syslog --verbose --verify --oomable root 20132 0.0 0.0 13612 312 ? S May31 0:00 ./stress-ng -v -t 5 --sigq 4 --ignite-cpu --syslog --verbose --verify --oomable root 20133 0.0 0.0 13612 312 ? S May31 0:00 ./stress-ng -v -t 5 --sigq 4 --ignite-cpu --syslog --verbose --verify --oomable ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-45-generic 4.13.0-45.50 ProcVersionSignature: Ubuntu 4.13.0-45.50-generic 4.13.16 Uname: Linux 4.13.0-45-generic s390x NonfreeKernelModules: zfs zunicode zavl zcommon znvpair 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': 'aplay' ApportVersion: 2.20.7-0ubuntu3.9 Architecture: s390x ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. CurrentDmesg: Date: Fri Jun 1 05:29:54 2018 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': '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=d86dc8de-6ac8-4e4b-aba8-92872a209a8c crashkernel=196M RelatedPackageVersions: linux-restricted-modules-4.13.0-45-generic N/A linux-backports-modules-4.13.0-45-generic N/A linux-firmware 1.169.4 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete ** Tags: apport-bug artful package-from-proposed s390x -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774571 Title: sigq test from stress-ng will get stuck with Artful kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1774571/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs