[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
I had this error today. It was on a 20.04 development test server, upon which I was trying to start a freshly installed 20.04 server guest. The error occurred because I had this on my grub command line: cgroup_no_v1=all Once I removed it, the VM started fine. Note that I do not use virt-manager, I was using "virsh start serv-dev". Why did I originally have "cgroup_no_v1=all"? Well, I forgot to get rid of it, after debugging problems with the schedutil governor for either the intel_cpufreq (intel_pstate in passive mode) or acpi-cpufreq CPU frequency scaling drivers for mainline kernel 5.4, where it gets busted due to "UCLAMP_TASK_GROUP=Y"in the Ubuntu kernel configuration. I was using kernel 5.3.0-18-generic today. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
Hello Simon, The fix for the current release can be made, but, in order for that to happen, we need an exact way how to make the error to happen, and what was your use case. Reading Debian bug and this bug, it appears that you've enabled cgroupv2, correct ? You likely enabled: systemd.unified_cgroup_hierarchy When specified without an argument or with a true argument, enables the usage of unified cgroup hierarchy[8] (a.k.a. cgroups-v2). When specified with a false argument, fall back to hybrid or full legacy cgroup hierarchy. in cmd line, right ? And your error happened because a cpu controller cannot be added to cgroupsv2 if there is a realtime process. Could you explain what is the realtime process, if you are aware of, and why you need cgroups v2 enabled ? With that, perhaps we can backport a specific fix for libvirt 5.0.0-1ubuntu2.5 (or later) and fix this behavior. Have you also tried removing rtkit package as a workaround ? Did it work ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
You can not fix this error in the current release? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
** Changed in: libvirt (Debian) Status: Unknown => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
I constantly use virtual machines. And this bug appeared after a regular update, about 3 weeks ago. I think this happened after the update libvirt on 5.0.0-1ubuntu2.4 or 5.0.0-1ubuntu2.5 On my PC ~ $ sudo apt-cache policy libvirt-daemon libvirt-daemon: Installed: 5.0.0-1ubuntu2.5 Candidate: 5.0.0-1ubuntu2.5 Version table: *** 5.0.0-1ubuntu2.5 500 500 http://archive.ubuntu.com/ubuntu disco-updates/main amd64 Packages 100 /var/lib/dpkg/status 5.0.0-1ubuntu2.4 500 500 http://archive.ubuntu.com/ubuntu disco-security/main amd64 Packages 5.0.0-1ubuntu2 500 500 http://archive.ubuntu.com/ubuntu disco/main amd64 Packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
Yep that Debian bug confirms my assumption cgroupv2 only works well with the newer libvirt >5.5. Could you outline how you got to a case that is affected by this so that we can try backporting fixes (not the full cgroupv2 feature, just if there is something that easily makes this skipping the bad part). ** Also affects: libvirt (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931243 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
files ** Attachment added: "dump.xml" https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+attachment/5291709/+files/dump.xml -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
** Attachment added: "dmesg.txt" https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+attachment/5291712/+files/dmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
** Attachment added: "installed.txt" https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+attachment/5291710/+files/installed.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
Hi https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931243 >Found in versions libvirt/5.0.0-4, libvirt/5.2.0-2 >Fixed in version libvirt/5.6.0-1 ** Bug watch added: Debian Bug tracker #931243 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931243 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
Hi, on my end I rechecked and can start a guest with virt-manager just fine. So we would need to find what is different on your configuration. Usual good data is: 1. the guest XML representation (virsh dumpxml ...) 2. a list of installed packages (apport would have provided that, but it seems you skipped) 3. dmesg (in case there are apparmor denials) Related to the error I found was some cgroupv2 code that isn't ready in 19.04 yet and should not be used. Actually it shouldn't be in there. Other people have ran into similar [1] and only with libvirt >=5.5 [2] I'd expect that to work which would mean Ubuntu 20.04. Have you enabled/configured/tested cgroupv2 to maybe trigger this? [1]: https://unix.stackexchange.com/questions/525498/libvirt-will-not-start-vms-with-error-invalid-value-cpu-for-cgroup-subtree [2]: https://bugzilla.redhat.com/show_bug.cgi?id=1727149 ** Bug watch added: Red Hat Bugzilla #1727149 https://bugzilla.redhat.com/show_bug.cgi?id=1727149 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1845562] Re: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control'
Thank you for taking the time to report this bug and helping to make Ubuntu better. Since it seems likely to me that this is a local configuration problem, rather than a bug in Ubuntu, I'm marking this bug as Incomplete. If indeed this is a local configuration problem, you can find pointers to get help for this sort of problem here: http://www.ubuntu.com/support/community Or if you believe that this is really a bug, then you may find it helpful to read "How to report bugs effectively" http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. We'd be grateful if you would then provide a more complete description of the problem, explain why you believe this is a bug in Ubuntu rather than a problem specific to your system, and then change the bug status back to New. ** Changed in: libvirt (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845562 Title: libvirt error Invalid value '+cpu' for 'cgroup.subtree_control' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1845562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
