[PATCH] sched: don't dump sched debug info in SysRq-W

From	Rabin Vincent <rabin.vincent@axis.com>
Newsgroups	linux.kernel
Subject	[PATCH] sched: don't dump sched debug info in SysRq-W
Date	2016-04-04 15:50 +0200
Message-ID	<rkd3c-3J0-23@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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From: Rabin Vincent <rabinv@axis.com>

sysrq_sched_debug_show() can dump a lot of information.  Don't print out
all that if we're just trying to get a list of blocked tasks (SysRq-W).
The information is still accessible with SysRq-T.

Signed-off-by: Rabin Vincent <rabinv@axis.com>
---
 kernel/sched/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 8b489fc..e330d6c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4998,7 +4998,8 @@ void show_state_filter(unsigned long state_filter)
 	touch_all_softlockup_watchdogs();
 
 #ifdef CONFIG_SCHED_DEBUG
-	sysrq_sched_debug_show();
+	if (!state_filter)
+		sysrq_sched_debug_show();
 #endif
 	rcu_read_unlock();
 	/*
-- 
2.7.0

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[PATCH] sched: don't dump sched debug info in SysRq-W Rabin Vincent <rabin.vincent@axis.com> - 2016-04-04 15:50 +0200
  [tip:sched/core] sched/debug: Don't dump sched debug info in  SysRq-W tip-bot for Rabin Vincent <tipbot@zytor.com> - 2016-04-13 13:40 +0200

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