Re: [libvirt] lxc: dominfo.cpuTime support using cgroups.cpuacct
On Fri, Mar 06, 2009 at 02:27:04PM +0100, Daniel Veillard wrote:
On Thu, Mar 05, 2009 at 02:34:48AM +0900, Ryota Ozaki wrote:
> Hi,
>
> This patch enables to get CPU usage of a lxc using cpuacct subsystem
> of cgroups.
Looks cool, what kernel version is required to make use of this ?
The kernel patch seems to be from last december, but I'm not sure.
I would just prefer to make sure it's in a released kernel version
before applying the patch here :-)
It is in 2.6.27 because I can see it there on my Fedora 9 box after
doing
# mount -t cgroup none /mnt/cg
# ls /mnt/cg
cpuacct.usage cpuset.memory_pressure_enabled devices.deny
cpuset.cpu_exclusive cpuset.memory_spread_page devices.list
cpuset.cpus cpuset.memory_spread_slab notify_on_release
cpuset.mem_exclusive cpuset.mems release_agent
cpuset.mem_hardwall cpuset.sched_load_balance tasks
cpuset.memory_migrate cpuset.sched_relax_domain_level
cpuset.memory_pressure devices.allow
The Linux kernel support for containers is still incomplete, so I don't
think it is worth fixing on a long term minimum kernel version for LXC
just yet. We still need the PTS filesystem virtualization before you can
consider LXC a reasonably secure container and I don't think that's
until 2.6.30.
Daniel
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