linux-kernel - [PATCH] sched: Print each field value left-aligned in sched_show

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Date:   Wed, 27 Jul 2022 14:08:19 +0800
From:   Zhen Lei <thunder.leizhen@...wei.com>
To:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>,
        "Mel Gorman" <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>,
        <linux-kernel@...r.kernel.org>
CC:     Zhen Lei <thunder.leizhen@...wei.com>
Subject: [PATCH] sched: Print each field value left-aligned in sched_show_task()

Currently, the values of some fields are printed right-aligned, causing
the field value to be next to the next field name rather than next to its
own field name. So print each field value left-aligned, to make it more
readable.

Before:
	stack:    0 pid:  307 ppid:     2 flags:0x00000008
After
	stack:0     pid:308   ppid:2      flags:0x0000000a

This also makes them print in the same style as the other two fields:
	task:demo0           state:R  running task

Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
---
 kernel/sched/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index da0bf6fe9ecdcf6..54e5fb2eeee898c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -8792,7 +8792,7 @@ 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",
+	pr_cont(" stack:%-5lu pid:%-5d ppid:%-6d flags:0x%08lx\n",
 		free, task_pid_nr(p), ppid,
 		read_task_thread_flags(p));
 
-- 
2.25.1