On 04/04/2013 03:40 PM, Daniel P. Berrange wrote: > /sys/fs/cgroup > ├── cpu,cpuacct > │ ├── libvirt > │ │ ├── lxc > │ │ │ └── busy > │ │ └── qemu > │ │ └── vm1 > │ │ ├── emulator > │ │ └── vcpu0 It's somehow off-topic but if you do a rework you might also consider a conceptual change wrt to $domain/emulator and $domain/vcpu* ... Just today I was confronted with a race in qemuSetupCgroupForEmulator/virCgroupMoveTask on highly utilized system. The problem is that if a QEMU thread terminates during the move from $domain/tasks to $domain/emulator/tasks the virCgroupAddTaskController call will fail resulting in a failure to start the domain. Another possible issue is that if new QEMU threads are spawned after the virCgroupGetValueStr call they will not be moved. So, since the threads in $domain/tasks are 'hypervisor' threads anyway, shouldn't we get rid of the emulator directory altogether? -- Mit freundlichen Grüßen/Kind Regards Viktor Mihajlovski IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martina Köderitz Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen Registergericht: Amtsgericht Stuttgart, HRB 243294 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list