[slurm-users] can't create memory group (cgroup)

[John Hearns]

Not an answer to your question - a good diagnostic for cgroups is the
utility 'lscgroups'
On Sat, 8 Sep 2018 at 10:10, Gennaro Oliva <oliva.g at na.icar.cnr.it> wrote:
>
> Hi Mike,
>
> On Fri, Sep 07, 2018 at 03:53:44PM +0000, Mike Cammilleri wrote:
> > I'm getting this error lately for everyone's jobs, which results in
> > memory not being constrained via the cgroups plugin.
> >
> >
> > slurmstepd: error: task/cgroup: unable to add task[pid=21681] to memory cg '(null)'
> > slurmstepd: error: jobacct_gather/cgroup: unable to instanciate user 3691 memory cgroup
> >
> > The result is that no uid_ direcotries are created under /sys/fs/cgroup/memory
> >
> >
> > Here is our cgroup.conf file:
> >
> > CgroupAutomount=yes
> > CgroupReleaseAgentDir="/etc/cgroup"
> > CgroupMountpoint=/sys/fs/cgroup
> > ConstrainCores=yes
> > ConstrainDevices=no
> > ConstrainRAMSpace=yes
> > ConstrainSwapSpace=yes
> > AllowedSwapSpace=0
> >
> > We are using jobacct_gather/cgroup
> > # ACCOUNTING
> > JobAcctGatherType=jobacct_gather/cgroup
> >
> > The partition is configured like this
> > PartitionName=long Nodes=marzano[05-13] PriorityTier=30 Default=NO MaxTime=5-0 State=UP OverSubscribe=FORCE:1
> >
> > We are using slurm 16.05.6 on Ubuntu 14.04 LTS
>
> Did you add "cgroup_enable=memory swapaccount=1" to the kernel command
> line as suggested here:
>
> https://slurm.schedmd.com/cgroups.html
>
> Best regards,
> --
> Gennaro Oliva
>