Given that, I'm marking the kernel tasks as invalid as this appears to be stress-ng being over aggressive.
MAAS deployments (and I presume server installs in general) only provide about 4 - 8GB swap max in a swap file created in the root filesystem (no swap partition anymore). It is not reasonable to create, IMO, 100GB swap files just to be sure we don't accidentally trip the OOMKiller when running memory tests. Also, the ratio seems to be variable. On my amd64 system, the swap consumed was 5x the amount of installed RAM. On the ppc64le system, the amount was just shy of 2x the amount of physical RAM (this is also a NUMA capable system, so maybe that's a contributing factor, beyond the differences in how each arch handles memory, which I freely admit to not understanding well. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1729878 Title: stress-ng triggering oomkiller running brk and stack stressors on all arches. Status in Stress-ng: New Status in linux package in Ubuntu: Invalid Status in linux source package in Artful: Invalid Bug description: During regression testing on a z/VM instance, I noticed call traces being dumped to dmesg that seem to be related to stress-ng. The stress-ng invocation we're using is: stress-ng --aggressive --verify --timeout $runtime \ --metrics-brief --tz --times \ --af-alg 0 --bsearch 0 --context 0 --cpu 0 \ --crypt 0 --hsearch 0 --longjmp 0 --lsearch 0 \ --matrix 0 --qsort 0 --str 0 --stream 0 \ --tsearch 0 --vecmath 0 --wcs 0 as executed by the cpu_stress script from the cpu/cpu_stress_ng test in the certification suite. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-16-generic 4.13.0-16.19 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 Uname: Linux 4.13.0-16-generic s390x 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: 2.20.7-0ubuntu3.1 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. Date: Fri Nov 3 11:12:04 2017 HibernationDevice: RESUME=UUID=1ce0f037-449a-43a1-af49-e730f6f99ac4 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' Lspci: Lsusb: Error: command ['lsusb'] failed with exit code 1: PciMultimedia: ProcEnviron: TERM=screen 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=/dev/mapper/hwe0008_vg-lv crashkernel=196M BOOT_IMAGE=0 RelatedPackageVersions: linux-restricted-modules-4.13.0-16-generic N/A linux-backports-modules-4.13.0-16-generic N/A linux-firmware 1.169 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: Upgraded to artful on 2017-11-02 (0 days ago) --- 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 ApportVersion: 2.20.7-0ubuntu3.1 Architecture: s390x ArecordDevices: Error: [Errno 2] No such file or directory CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. DistroRelease: Ubuntu 17.10 HibernationDevice: RESUME=UUID=1ce0f037-449a-43a1-af49-e730f6f99ac4 IwConfig: Error: [Errno 2] No such file or directory Lspci: Lsusb: Error: command ['lsusb'] failed with exit code 1: Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=screen 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=/dev/mapper/hwe0008_vg-lv crashkernel=196M BOOT_IMAGE=0 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 RelatedPackageVersions: linux-restricted-modules-4.13.0-16-generic N/A linux-backports-modules-4.13.0-16-generic N/A linux-firmware 1.169 RfKill: Error: [Errno 2] No such file or directory Tags: artful Uname: Linux 4.13.0-16-generic s390x UpgradeStatus: Upgraded to artful on 2017-11-02 (0 days ago) UserGroups: adm cdrom cpacfstats dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/stress-ng/+bug/1729878/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
