[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20221206083641.103832-1-yajun.deng@linux.dev>
Date: Tue, 6 Dec 2022 16:36:41 +0800
From: Yajun Deng <yajun.deng@...ux.dev>
To: mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
vincent.guittot@...aro.org, dietmar.eggemann@....com,
rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
bristot@...hat.com, vschneid@...hat.com
Cc: linux-kernel@...r.kernel.org, Yajun Deng <yajun.deng@...ux.dev>
Subject: [PATCH] sched/rt: Add pid and comm when RT throttling activated
It is difficult to know which process consumes time when RT throttling
activated.
So add pid and comm for this case.
Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
---
kernel/sched/rt.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index ed2a47e4ddae..1f267ab1b59a 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -1012,6 +1012,7 @@ static int sched_rt_runtime_exceeded(struct rt_rq *rt_rq)
if (rt_rq->rt_time > runtime) {
struct rt_bandwidth *rt_b = sched_rt_bandwidth(rt_rq);
+ struct task_struct *curr = rq_of_rt_rq(rt_rq)->curr;
/*
* Don't actually throttle groups that have no runtime assigned
@@ -1019,7 +1020,8 @@ static int sched_rt_runtime_exceeded(struct rt_rq *rt_rq)
*/
if (likely(rt_b->rt_runtime)) {
rt_rq->rt_throttled = 1;
- printk_deferred_once("sched: RT throttling activated\n");
+ printk_deferred_once("pid: %d, comm: %s, sched: RT throttling activated\n",
+ curr->pid, curr->comm);
} else {
/*
* In case we did anyway, make it go away,
--
2.25.1
Powered by blists - more mailing lists