From: Libing Zhou <libing.zhou@nokia-sbell.com>
To: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
vincent.guittot@linaro.org
Cc: linux-kernel@vger.kernel.org, libing.zhou@nokia-sbell.com,
dietmar.eggemann@arm.com, rostedt@goodmis.org,
bsegall@google.com, mgorman@suse.de
Subject: [PATCH] sched: print fields name when do sched_show_task
Date: Thu, 13 Aug 2020 18:48:34 +0800 [thread overview]
Message-ID: <20200813104833.17573-1-libing.zhou@nokia-sbell.com> (raw)
Current sysrq(t) output task fields name are not aligned with
actual task fields value, e.g.:
kernel: sysrq: SysRq : Show State
kernel: task PC stack pid father
kernel: systemd S12456 1 0 0x00000000
kernel: Call Trace:
kernel: ? __schedule+0x240/0x740
To make it more readable, print fields name together with task fields
value in same line, remove separate fields name print.
Signed-off-by: Libing Zhou <libing.zhou@nokia-sbell.com>
---
kernel/sched/core.c | 15 ++++-----------
1 file changed, 4 insertions(+), 11 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index e15543cb8481..0ad554cb0bbb 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6069,10 +6069,10 @@ void sched_show_task(struct task_struct *p)
if (!try_get_task_stack(p))
return;
- printk(KERN_INFO "%-15.15s %c", p->comm, task_state_to_char(p));
+ pr_info("task:%-15.15s state:%c", p->comm, task_state_to_char(p));
if (p->state == TASK_RUNNING)
- printk(KERN_CONT " running task ");
+ pr_cont(" running task ");
#ifdef CONFIG_DEBUG_STACK_USAGE
free = stack_not_used(p);
#endif
@@ -6081,8 +6081,8 @@ void sched_show_task(struct task_struct *p)
if (pid_alive(p))
ppid = task_pid_nr(rcu_dereference(p->real_parent));
rcu_read_unlock();
- printk(KERN_CONT "%5lu %5d %6d 0x%08lx\n", free,
- task_pid_nr(p), ppid,
+ pr_cont(" stack:%5lu pid:%5d ppid:%6d flags:0x%08lx\n",
+ free, task_pid_nr(p), ppid,
(unsigned long)task_thread_info(p)->flags);
print_worker_info(KERN_INFO, p);
@@ -6117,13 +6117,6 @@ void show_state_filter(unsigned long state_filter)
{
struct task_struct *g, *p;
-#if BITS_PER_LONG == 32
- printk(KERN_INFO
- " task PC stack pid father\n");
-#else
- printk(KERN_INFO
- " task PC stack pid father\n");
-#endif
rcu_read_lock();
for_each_process_thread(g, p) {
/*
--
2.22.0
next reply other threads:[~2020-08-13 10:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-13 10:48 Libing Zhou [this message]
2020-08-13 19:11 ` [PATCH] sched: print fields name when do sched_show_task Ingo Molnar
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