Re: [PATCH 1/9] perf/core: Add PERF_RECORD_CGROUP event

[Peter Zijlstra]

On Wed, Aug 28, 2019 at 04:31:22PM +0900, Namhyung Kim wrote:
> To support cgroup tracking, add CGROUP event to save a link between
> cgroup path and inode number.  The attr.cgroup bit was also added to
> enable cgroup tracking from userspace.
> 
> This event will be generated when a new cgroup becomes active.
> Userspace might need to synthesize those events for existing cgroups.
> 
> As aux_output change is also going on, I just added the bit here as
> well to remove possible conflicts later.
> 
> Cc: Tejun Heo <tj@xxxxxxxxxx>
> Cc: Li Zefan <lizefan@xxxxxxxxxx>
> Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
> Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
> ---
>  include/uapi/linux/perf_event.h |  15 ++++-
>  kernel/events/core.c            | 112 ++++++++++++++++++++++++++++++++
>  2 files changed, 126 insertions(+), 1 deletion(-)
> 
> diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
> index 7198ddd0c6b1..cb07c24b715f 100644
> --- a/include/uapi/linux/perf_event.h
> +++ b/include/uapi/linux/perf_event.h
> @@ -374,7 +374,9 @@ struct perf_event_attr {
>  				namespaces     :  1, /* include namespaces data */
>  				ksymbol        :  1, /* include ksymbol events */
>  				bpf_event      :  1, /* include bpf events */
> -				__reserved_1   : 33;
> +				aux_output     :  1, /* generate AUX records instead of events */
> +				cgroup         :  1, /* include cgroup events */
> +				__reserved_1   : 31;

That looks like a rebase fail, aux_output is not from these patches.