linux-kernel - [tip: sched/core] sched/debug: Print 'tgid' in sched_show

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Date:   Thu, 05 Oct 2023 08:59:34 -0000
From:   "tip-bot2 for Yajun Deng" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Yajun Deng <yajun.deng@...ux.dev>, Ingo Molnar <mingo@...nel.org>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: sched/core] sched/debug: Print 'tgid' in sched_show_task()

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     9b46f1abc6d4e855ebd91b011aa3b49042bad7e4
Gitweb:        https://git.kernel.org/tip/9b46f1abc6d4e855ebd91b011aa3b49042bad7e4
Author:        Yajun Deng <yajun.deng@...ux.dev>
AuthorDate:    Thu, 20 Jul 2023 16:05:16 +08:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Thu, 05 Oct 2023 10:49:56 +02:00

sched/debug: Print 'tgid' in sched_show_task()

Multiple blocked tasks are printed when the system hangs. They may have
the same parent pid, but belong to different task groups.

Printing tgid lets users better know whether these tasks are from the same
task group or not.

Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/20230720080516.1515297-1-yajun.deng@linux.dev
---
 kernel/sched/core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index f5783cb..cf6d3fd 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -9089,9 +9089,9 @@ void sched_show_task(struct task_struct *p)
 	if (pid_alive(p))
 		ppid = task_pid_nr(rcu_dereference(p->real_parent));
 	rcu_read_unlock();
-	pr_cont(" stack:%-5lu pid:%-5d ppid:%-6d flags:0x%08lx\n",
-		free, task_pid_nr(p), ppid,
-		read_task_thread_flags(p));
+	pr_cont(" stack:%-5lu pid:%-5d tgid:%-5d ppid:%-6d flags:0x%08lx\n",
+		free, task_pid_nr(p), task_tgid_nr(p),
+		ppid, read_task_thread_flags(p));
 
 	print_worker_info(KERN_INFO, p);
 	print_stop_info(KERN_INFO, p);