[PATCH] sched_ext: Fix missing SCX_EV_SUB_BYPASS_DISPATCH aggregation in scx_read_events()

[PATCH] sched_ext: Fix missing SCX_EV_SUB_BYPASS_DISPATCH aggregation in scx_read_events()

[Cheng-Yang Chou]

025b1bd41965 introduced SCX_EV_SUB_BYPASS_DISPATCH to track scheduling
of bypassed descendant tasks, and correctly increments it per-CPU and
displays it in sysfs and dump output. However, scx_read_events() which
aggregates per-CPU counters into a summary was not updated to include
this event, causing it to always read as zero in sysfs, in debug dumps,
and via the scx_bpf_events() kfunc.

Add the missing scx_agg_event() call for SCX_EV_SUB_BYPASS_DISPATCH.

Fixes: 025b1bd41965 ("sched_ext: Implement hierarchical bypass mode")
Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
---
 kernel/sched/ext.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index 551bfb99157d..57c33127fe61 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -9408,6 +9408,7 @@ static void scx_read_events(struct scx_sched *sch, struct scx_event_stats *event
 		scx_agg_event(events, e_cpu, SCX_EV_BYPASS_DISPATCH);
 		scx_agg_event(events, e_cpu, SCX_EV_BYPASS_ACTIVATE);
 		scx_agg_event(events, e_cpu, SCX_EV_INSERT_NOT_OWNED);
+		scx_agg_event(events, e_cpu, SCX_EV_SUB_BYPASS_DISPATCH);
 	}
 }
 
-- 
2.48.1

Re: [PATCH] sched_ext: Fix missing SCX_EV_SUB_BYPASS_DISPATCH aggregation in scx_read_events()

[Tejun Heo]

Applied to sched_ext/for-7.1.

Thanks.

-- 
tejun