On Tue, Jul 27, 2021 at 08:33:12AM +0300, Vasily Averin wrote: > The kernel allocates ~400 bytes of 'strcut mount' for any new mount. > Creating a new mount namespace clones most of the parent mounts, > and this can be repeated many times. Additionally, each mount allocates > up to PATH_MAX=4096 bytes for mnt->mnt_devname. > > It makes sense to account for these allocations to restrict the host's > memory consumption from inside the memcg-limited container. > > Signed-off-by: Vasily Averin <vvs@xxxxxxxxxxxxx> > --- Looks good. Thank you! Acked-by: Christian Brauner <christian.brauner@xxxxxxxxxx> I wonder how much this increases reported memory consumption when you boot full system containers that run systemd and a bunch of systemd services that each use a separate mount namespace.
