[lxc-users] Mounting huge pages on a conatiner

[Serge Hallyn]

Quoting Murthy, Krishna J (krishna.j.murthy at intel.com):
> > I use Huge Pages inside a container routinely, for Mysql. I had to change
> > /etc/sysctl.conf inside the container.
> > that lines I included are
> > kernel.shmall = 4294967296
> > kernel.shmmax = 68719476736
> > basically you need to make huge pages available in the host first, and
> > they will be available in the container
> 
> Ok. In this case we are allocating the shared memory. How do we make this memory 
> visible for apps that expect it be mounted as hugetlbfs. 
> 
> root at vc0:~# df -lh
> Filesystem      Size  Used Avail Use% Mounted on
> /dev/root        50G  7.6G   39G  17% /
> none             16G     0   16G   0% /dev/shm
> 
> root at vc0:~# cat /proc/sys/vm/nr_hugepages
> 5

Bind mount it to wherever your application expects to see it?
I.e.

lxc.mount.entry = /run/hugepages/kvm run/hugepages/kvm none bind,create=dir 0 0