[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1905993
Title:
Actual kernel don't want to make more than 64 cpus available
Status in linux package in Ubuntu:
Expired
Bug description:
This is kinda complicated but i try my best to explain it as much as i
can.
First of all i found out that in bionic beaver cloud image i was able to have
248 cpus without any issues.
Then i've taken a look into focal, but there i was only able to get up up to
64 cpus.
Then i've tryed to figure out what was wrong. Debian, wasnt able to handle
this with a 4.19 kernel.
Bionic beaver had 4.18 so i tried to upgrade to a 4.19 with success but only
with 64 cpus.
So i think the problem maybe exist since 4.19.
My setup. Openstack Hypervisor with ubuntu 18.04
KVM/Qemu with a vm clean bionic works fine, till i upgrade to a kernel > 4.18.
Every 5.* version seems to be affected as well.
Debian buster has this issue and fedora (Both in latest versions with
kernel above 4.18)
Already started debugging with TJ- at irc.
Paste links with debugging informations
/sys/devices/system/cpu/cpu*/topology/ http://paste.ubuntu.com/p/5txHGPHpBT/
and
virsh dumpxml of the VM https://pastebin.ubuntu.com/p/sPWHVMn5FX/
CPU on the Hypervisor (works fine):
https://pastebin.ubuntu.com/p/KRNMSThT92/
Hope this helps to dig down the bug.
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.20
Architecture: amd64
DistroRelease: Ubuntu 18.04
Package: linux (not installed)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C.UTF-8
SHELL=/bin/bash
Tags: bionic uec-images
Uname: Linux 4.19.160-0419160-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio cdrom dialout dip floppy lxd netdev plugdev sudo video
_MarkForUpload: True
---
ProblemType: Bug
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Nov 27 21:50 seq
crw-rw---- 1 root audio 116, 33 Nov 27 21:50 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.20
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord':
'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: N/A
DistroRelease: Ubuntu 18.04
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lsusb:
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: OpenStack Foundation OpenStack Nova
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C.UTF-8
SHELL=/bin/bash
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-63-generic
root=UUID=17d2bcf1-3687-426a-8219-978743746d51 ro console=tty1 console=ttyS0
ProcVersionSignature: Ubuntu 5.0.0-63.69-generic 5.0.21
RelatedPackageVersions:
linux-restricted-modules-5.0.0-63-generic N/A
linux-backports-modules-5.0.0-63-generic N/A
linux-firmware N/A
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
Tags: bionic uec-images
Uname: Linux 5.0.0-63-generic x86_64
UnreportableReason: This report is about a package that is not installed.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio cdrom dialout dip floppy lxd netdev plugdev sudo video
_MarkForUpload: False
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: 1.10.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-4.0
dmi.modalias:
dmi:bvnSeaBIOS:bvr1.10.2-1ubuntu1:bd04/01/2014:svnOpenStackFoundation:pnOpenStackNova:pvr20.1.1:cvnQEMU:ct1:cvrpc-i440fx-4.0:
dmi.product.family: Virtual Machine
dmi.product.name: OpenStack Nova
dmi.product.version: 20.1.1
dmi.sys.vendor: OpenStack Foundation
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