perf: Only update context time when active

Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
chewitt · Feb 25, 2016 · 6f932e5 · 6f932e5
1 parent a4f4bb6
commit 6f932e5
Showing 1 changed file with 6 additions and 6 deletions.
diff --git a/kernel/events/core.c b/kernel/events/core.c
@@ -2170,12 +2170,12 @@ perf_install_in_context(struct perf_event_context *ctx,
 		raw_spin_unlock_irq(&ctx->lock);
 		return;
 	}
-	update_context_time(ctx);
-	/*
-	 * Update cgrp time only if current cgrp matches event->cgrp.
-	 * Must be done before calling add_event_to_ctx().
-	 */
-	update_cgrp_time_from_event(event);
+
+	if (ctx->is_active) {
+		update_context_time(ctx);
+		update_cgrp_time_from_event(event);
+	}
+
 	add_event_to_ctx(event, ctx);
 	raw_spin_unlock_irq(&ctx->lock);