[libvirt] [PATCH v3 00/16]
Gao feng
gaofeng at cn.fujitsu.com
Thu Apr 11 02:56:20 UTC 2013
On 2013/04/10 18:08, Daniel P. Berrange wrote:
> This is an update of
>
> https://www.redhat.com/archives/libvir-list/2013-April/msg00352.html
>
> Currently libvirt creates a cgroups hiearchy at
>
> $LOCATION-OF-LIBVIRTD/libvirt/{qemu,lxc}/$GUEST-NAME
>
> eg
>
> /sys/fs/cgroup
> ├── blkio
> │ └── libvirt
> │ ├── lxc
> │ │ └── busy
> │ └── qemu
> │ └── vm1
> ├── cpu,cpuacct
> │ ├── libvirt
> │ │ ├── lxc
> │ │ │ └── busy
> │ │ └── qemu
> │ │ └── vm1
> │ │ ├── emulator
> │ │ └── vcpu0
> │ └── system
> │ ├── abrtd.service
> │ ....snip....
> │ └── upower.service
> ├── cpuset
> │ └── libvirt
> │ ├── lxc
> │ │ └── busy
> │ └── qemu
> │ └── vm1
> │ ├── emulator
> │ └── vcpu0
> ├── devices
> │ └── libvirt
> │ ├── lxc
> │ │ └── busy
> │ └── qemu
> │ └── vm1
> ├── freezer
> │ └── libvirt
> │ ├── lxc
> │ │ └── busy
> │ └── qemu
> │ └── vm1
> ├── memory
> │ └── libvirt
> │ ├── lxc
> │ │ └── busy
> │ └── qemu
> │ └── vm1
> ├── net_cls
> ├── perf_event
>
>
> This series changes it so that libvirt creates cgroups at
>
> /system/$VMNAME.{qemu,lxc}.libvirt
>
> and allows configuration of the "resource partition" (ie the
> "/system" bit) via the XML. So we get a layout like this:
>
> /sys/fs/cgroup
> ├── blkio
> │ └── system
> │ ├── demo.lxc.libvirt
> │ └── vm1.qemu.libvirt
> ├── cpu,cpuacct
> │ └── system
> │ ├── abrtd.service
> │ ....snip....
> │ ├── demo.lxc.libvirt
> │ ....snip....
> │ └── vm1.qemu.libvirt
> │ ├── emulator
> │ └── vcpu0
> ├── cpuset
> │ └── system
> │ ├── demo.lxc.libvirt
> │ └── vm1.qemu.libvirt
> │ ├── emulator
> │ └── vcpu0
> ├── devices
> │ └── system
> │ ├── demo.lxc.libvirt
> │ └── vm1.qemu.libvirt
> ├── freezer
> │ └── system
> │ ├── demo.lxc.libvirt
> │ └── vm1.qemu.libvirt
> ├── memory
> │ └── system
> │ ├── demo.lxc.libvirt
> │ └── vm1.qemu.libvirt
> ├── net_cls
> ├── perf_event
>
>
> Flattening out the libvirt created hiearchy has serious
> performance wins, due to poor kernel scalability with
> deep hierarchies. It also makes it easier to configure
> system wide policy for resource usage across system
> services and virtual machines / containers, since they
> all live at the top level in comon resource partitions.
>
> Changes since v2:
>
> - Merge previously ACKed patches
> - Incorporate Gao Feng's changes to LXC cgroup mount setup
>
I will review this patchset and do some simple test in this week.
Thanks for your great work :)
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