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Comment 3Martin Kletzander
2013-05-16 09:16:23 UTC
I've found out the problem, but not the root cause, yet. I'm bisecting the sources now, so I'm assigning it to myself.
Comment 6Martin Kletzander
2013-05-16 20:24:15 UTC
Moving to POST with upstream commit v1.0.5-243-g0471637:
commit 0471637d5628106d058f0eb5516ffa7d5285cc6f
Author: Martin Kletzander <mkletzan>
Date: Thu May 16 14:37:54 2013 +0200
qemu: Fix cgroup handling when setting VCPU BW
This request was resolved in Red Hat Enterprise Linux 7.0.
Contact your manager or support representative in case you have further questions about the request.
Description of problem: set emulator_period failed, return "error: Unable to find emulator cgroup for rhel7: No such file or directory" Version-Release number of selected component (if applicable): libvirt-1.0.5-1.el7.x86_64 qemu-kvm-1.4.0-4.el7.x86_64 kernel-3.9.0-0.55.el7.x86_64 How reproducible: 100% Steps: 1. edit a domain with: <vcpu placement='auto'>2</vcpu> <cputune> <shares>2048</shares> <period>1000000</period> <quota>1000</quota> <emulator_period>1000000</emulator_period> <emulator_quota>1000</emulator_quota> <vcpupin vcpu='0' cpuset='0'/> <vcpupin vcpu='1' cpuset='1'/> <emulatorpin cpuset='2'/> </cputune> 2. start it [root@dhcp-66-71-41 ~]# virsh start rhel7 3. check schedinfo [root@dhcp-66-71-41 ~]# virsh schedinfo rhel7 Scheduler : posix cpu_shares : 2048 vcpu_period : 1000000 vcpu_quota : 1000 emulator_period: 1000000 emulator_quota : 1000 4. set emulator_period [root@dhcp-66-71-41 ~]# virsh schedinfo rhel7 --set emulator_period=900000 Scheduler : posix error: Unable to find emulator cgroup for rhel7: No such file or directory Actual results: cannot set emulator_period. Expected results: set emulator_period successfully.