For pmus which are not per cpu, but e.g. per package/socket, we want to be able to store a reference to the underlying per package/socket facility in the event at init time so we can avoid magic storage constructs in the pmu driver. This allows us to get rid of the per cpu dance in the intel uncore and rapl drivers and avoids a lookup of the per package data in the perf hotpath. Signed-off-by: Thomas Gleixner --- include/linux/perf_event.h | 1 + 1 file changed, 1 insertion(+) --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -467,6 +467,7 @@ struct perf_event { int group_flags; struct perf_event *group_leader; struct pmu *pmu; + void *pmu_private; enum perf_event_active_state state; unsigned int attach_state;