On Fri, May 13, 2022 at 06:51:55PM +0300, Vasily Averin wrote: > kernfs nodes are quite small kernel objects, however there are few > scenarios where it consumes significant piece of all allocated memory: > > 1) creating a new netdevice allocates ~50Kb of memory, where ~10Kb > was allocated for 80+ kernfs nodes. > > 2) cgroupv2 mkdir allocates ~60Kb of memory, ~10Kb of them are kernfs > structures. > > 3) Shakeel Butt reports that Google has workloads which create 100s > of subcontainers and they have observed high system overhead > without memcg accounting of kernfs. > > It makes sense to enable accounting for kernfs objects, otherwise its > misuse inside memcg-limited can lead to global memory shortage, > OOM and random kills of host processes. > > Signed-off-by: Vasily Averin <vvs@xxxxxxxxxx> Acked-by: Shakeel Butt <shakeelb@xxxxxxxxxx> You can keep the ack if you decide to include simple_xattr_alloc() in following version or different patch.
