From: Rabin Vincent <rabinv@xxxxxxxx> commit fb90a6e93c0684ab2629a42462400603aa829b9c upstream. 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@xxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/1459777322-30902-1-git-send-email-rabin.vincent@xxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Nikolay Borisov <n.borisov.lkml@xxxxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> Signed-off-by: Willy Tarreau <w@xxxxxx> --- 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 506e56e..0892cfa 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4745,7 +4745,8 @@ 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(); /* -- 2.8.0.rc2.1.gbe9624a