cpuset filesystems - a (short) doubt

cpuset filesystems - a (short) doubt

[David Shwatrz]

Hi,
I have a question about cpuset filesystem - is it needed ?

In the cpuset example given in:
http://lxr.free-electrons.com/source/Documentation/cgroups/cgroups.txt
we do not use the cpuset filesystsm but the cgroup filesystsm.
(mount -t cgroup -ocpuset cpuset /sys/fs/cgroup/cpuset)

On my distro, which uses systemd + cgroups:
mount | grep "type cpuset"
gives nothing.

On the other hands, mount | grep "type cgroup" | wc -l
gives: 9

I looked in the code of other subsystems (like blk cgroup and  memcg -
memory control groups) and there is no filesystsm in the code; see
block/blk-cgroup.c
mm/memcontrol.c

so is the cpuset filesystsm really needed ?


DS

Re: cpuset filesystems - a (short) doubt

[Li Zefan]

On 2013/4/2 22:17, David Shwatrz wrote:
> Hi,
> I have a question about cpuset filesystem - is it needed ?
> 
> In the cpuset example given in:
> http://lxr.free-electrons.com/source/Documentation/cgroups/cgroups.txt
> we do not use the cpuset filesystsm but the cgroup filesystsm.
> (mount -t cgroup -ocpuset cpuset /sys/fs/cgroup/cpuset)
> 
> On my distro, which uses systemd + cgroups:
> mount | grep "type cpuset"
> gives nothing.
> 
> On the other hands, mount | grep "type cgroup" | wc -l
> gives: 9
> 
> I looked in the code of other subsystems (like blk cgroup and  memcg -
> memory control groups) and there is no filesystsm in the code; see
> block/blk-cgroup.c
> mm/memcontrol.c
> 
> so is the cpuset filesystsm really needed ?
> 

The cpuset filesystem is for backward compatibility.