Re: [PATCH v3 05/10] perf/cgroup: Grow per perf_cpu_context heap storage

[Peter Zijlstra]

On Wed, Nov 13, 2019 at 04:30:37PM -0800, Ian Rogers wrote:
> Allow the per-CPU min heap storage to have sufficient space for per-cgroup
> iterators.
> 
> Based-on-work-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
> Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
> ---
>  kernel/events/core.c | 47 ++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 47 insertions(+)
> 
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 0dab60bf5935..3c44be7de44e 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -892,6 +892,47 @@ static inline void perf_cgroup_sched_in(struct task_struct *prev,
>  	rcu_read_unlock();
>  }
>  
> +static int perf_cgroup_ensure_itr_storage_cap(struct perf_event *event,

That's a ludicrous function name.

> +					struct cgroup_subsys_state *css)
> +{