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Subject[PATCH] perf/core: Update cgroup time with descendants
Date
From: "leilei.lin" <leilei.lin@alibaba-inc.com>

This fix updating cgroup time when event is being scheduled in
by cgroup descendants

Signed-off-by: leilei.lin <leilei.lin@alibaba-inc.com>
---
kernel/events/core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 3e691b7..6f6bd1e 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -662,7 +662,9 @@ static inline void update_cgrp_time_from_event(struct perf_event *event)
/*
* Do not update time when cgroup is not active
*/
- if (cgrp == event->cgrp)
+ if (cgrp == event->cgrp ||
+ cgroup_is_descendant(cgrp->css.cgroup,
+ event->cgrp->css.cgroup))
__update_cgrp_time(event->cgrp);
}

--
2.8.4.31.g9ed660f
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