From: tip-bot for Peter Zijlstra <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de,
peterz@infradead.org, hpa@zytor.com,
torvalds@linux-foundation.org, mingo@kernel.org
Subject: [tip:sched/urgent] sched/debug: Add debugfs knob for "sched_debug"
Date: Tue, 12 Sep 2017 11:05:55 -0700 [thread overview]
Message-ID: <tip-9469eb01db891b55367ee7539f1b9f7f6fd2819d@git.kernel.org> (raw)
In-Reply-To: <20170907150614.142924283@infradead.org>
Commit-ID: 9469eb01db891b55367ee7539f1b9f7f6fd2819d
Gitweb: http://git.kernel.org/tip/9469eb01db891b55367ee7539f1b9f7f6fd2819d
Author: Peter Zijlstra <peterz@infradead.org>
AuthorDate: Thu, 7 Sep 2017 17:03:53 +0200
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 12 Sep 2017 17:41:04 +0200
sched/debug: Add debugfs knob for "sched_debug"
I'm forever late for editing my kernel cmdline, add a runtime knob to
disable the "sched_debug" thing.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170907150614.142924283@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
kernel/sched/debug.c | 5 +++++
kernel/sched/sched.h | 2 ++
kernel/sched/topology.c | 4 +---
3 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 4a23bbc..b19d06ea 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -181,11 +181,16 @@ static const struct file_operations sched_feat_fops = {
.release = single_release,
};
+__read_mostly bool sched_debug_enabled;
+
static __init int sched_init_debug(void)
{
debugfs_create_file("sched_features", 0644, NULL, NULL,
&sched_feat_fops);
+ debugfs_create_bool("sched_debug", 0644, NULL,
+ &sched_debug_enabled);
+
return 0;
}
late_initcall(sched_init_debug);
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index ab1c7f5..7ea2a03 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1954,6 +1954,8 @@ extern struct sched_entity *__pick_first_entity(struct cfs_rq *cfs_rq);
extern struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq);
#ifdef CONFIG_SCHED_DEBUG
+extern bool sched_debug_enabled;
+
extern void print_cfs_stats(struct seq_file *m, int cpu);
extern void print_rt_stats(struct seq_file *m, int cpu);
extern void print_dl_stats(struct seq_file *m, int cpu);
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 6f7b439..2ab2aa6 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -14,11 +14,9 @@ cpumask_var_t sched_domains_tmpmask2;
#ifdef CONFIG_SCHED_DEBUG
-static __read_mostly int sched_debug_enabled;
-
static int __init sched_debug_setup(char *str)
{
- sched_debug_enabled = 1;
+ sched_debug_enabled = true;
return 0;
}
prev parent reply other threads:[~2017-09-12 18:09 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-07 15:03 [PATCH 0/4] sched: Fix some load-balancer vs hotplug holes Peter Zijlstra
2017-09-07 15:03 ` [PATCH 1/4] sched/fair: Avoid newidle balance for !active CPUs Peter Zijlstra
2017-09-12 18:04 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2017-09-07 15:03 ` [PATCH 2/4] sched/fair: Plug hole between hotplug and active load_balance Peter Zijlstra
2017-09-12 18:05 ` [tip:sched/urgent] sched/fair: Plug hole between hotplug and active_load_balance() tip-bot for Peter Zijlstra
2017-09-07 15:03 ` [PATCH 3/4] sched: WARN when migrating to an offline CPU Peter Zijlstra
2017-09-12 18:05 ` [tip:sched/urgent] sched/core: WARN() " tip-bot for Peter Zijlstra
2017-09-28 9:14 ` [PATCH 3/4] sched: WARN " Sasha Levin
2017-09-28 10:35 ` Peter Zijlstra
2017-09-28 11:03 ` Levin, Alexander (Sasha Levin)
2017-09-28 11:42 ` Peter Zijlstra
2017-09-29 11:11 ` Peter Zijlstra
2017-10-07 2:07 ` Levin, Alexander (Sasha Levin)
2017-10-07 9:15 ` Peter Zijlstra
[not found] ` <20171007174327.ky6g5viokxg5ysdm@sasha-lappy>
2017-10-09 8:04 ` Peter Zijlstra
2017-10-10 1:18 ` Levin, Alexander (Sasha Levin)
2017-09-07 15:03 ` [PATCH 4/4] sched/debug: Add debugfs knob for "sched_debug" Peter Zijlstra
2017-09-12 18:05 ` tip-bot for Peter Zijlstra [this message]
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