On Fri, Sep 14, 2012 at 9:29 PM, Tejun Heo [off-list ref] wrote:

On Fri, Sep 14, 2012 at 09:58:30AM -0400, Vivek Goyal wrote:

quoted

I am little concerned about above and wondering how systemd and libvirt
will interact and behave out of the box.

Currently systemd does not create its own hierarchy under blkio and
libvirt does. So putting all together means there is no way to avoid
the overhead of systemd created hierarchy.

\
|
+- system
     |
     +- libvirtd.service
              |
              +- virt-machine1
              +- virt-machine2

So there is now way to avoid the overhead of two levels of hierarchy
created by systemd. I really wish that systemd gets rid of "system"
cgroup and puts services directly in top level group. Creating deeper
hieararchices is expensive.

The idea here is to split equally between the "system" and the "user"s
at that level.

That all can be re-considered and changed if really needed, but it's
not an unintentionally created directory.

Thanks,
Kay