Re: [PATCH] mm: add group_oom_kill memory event

[Johannes Weiner]

This makes perfect sense, just one minor point:

On Fri, Dec 03, 2021 at 08:24:23AM -0800, Dan Schatzberg wrote:
> @@ -4390,6 +4390,9 @@ static int mem_cgroup_oom_control_read(struct seq_file *sf, void *v)
>  	seq_printf(sf, "under_oom %d\n", (bool)memcg->under_oom);
>  	seq_printf(sf, "oom_kill %lu\n",
>  		   atomic_long_read(&memcg->memory_events[MEMCG_OOM_KILL]));
> +	seq_printf(sf, "oom_group_kill %lu\n",
> +		   atomic_long_read(
> +			&memcg->memory_events[MEMCG_OOM_GROUP_KILL]));
>  	return 0;
>  }

oom_control is a cgroup1 file, but group-oom is a cgroup2-only
feature. Best to drop this hunk.

With that, please add:
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>