Messages in this thread Patch in this message | | | From | Stephane Eranian <> | Subject | [PATCH v2 1/3] perf: add active_entry list head to struct perf_event | Date | Thu, 10 Oct 2013 16:50:06 +0200 |
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This patch adds a new fields to the struct perf_event. It is intended to be used to chain events which are active (enabled). It helps in the hardware layer for PMU which do not have actual counter restrictions, i.e., free running read-only counters. Active events are chained as opposed to being tracked via the counter they use.
Signed-off-by: Stephane Eranian <eranian@google.com> --- include/linux/perf_event.h | 1 + kernel/events/core.c | 1 + 2 files changed, 2 insertions(+)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 2e069d1..a376384 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -435,6 +435,7 @@ struct perf_event { struct perf_cgroup *cgrp; /* cgroup event is attach to */ int cgrp_defer_enabled; #endif + struct list_head active_entry; #endif /* CONFIG_PERF_EVENTS */ }; diff --git a/kernel/events/core.c b/kernel/events/core.c index c716385..b1dbf79 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -6629,6 +6629,7 @@ perf_event_alloc(struct perf_event_attr *attr, int cpu, INIT_LIST_HEAD(&event->event_entry); INIT_LIST_HEAD(&event->sibling_list); INIT_LIST_HEAD(&event->rb_entry); + INIT_LIST_HEAD(&event->active_entry); init_waitqueue_head(&event->waitq); init_irq_work(&event->pending, perf_pending_event); -- 1.7.9.5
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