[PATCH 1/3] perf: comment on usage of perf_invalid_context

[Cody P Schafer]

Context numbers less than 0 are treated specially within the events
code, add a comment to document this.

Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
---
 include/linux/sched.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 53f97eb..f574820 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1033,6 +1033,10 @@ struct sched_rt_entity {
 struct rcu_node;
 
 enum perf_event_task_context {
+	/*
+	 * When <0, allocate a pmu local pmu->pmu_cpu_context (instead
+	 * of sharing among pmus in the same context) and forbid task tracking.
+	 */
 	perf_invalid_context = -1,
 	perf_hw_context = 0,
 	perf_sw_context,
-- 
1.8.5.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/