** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1623143
Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list: 1-2 Mems_allowed: 00000000,00000001 Mems_allowed_list: 0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list: 0-2 Mems_allowed: 00000000,00000001 Mems_allowed_list: 0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware 1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+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
