Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5d68cc95 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched/debug: Ignore TASK_IDLE for SysRq-W 



Markus reported that tasks in TASK_IDLE state are reported by SysRq-W,
which results in undesirable clutter.

Reported-by: default avatarMarkus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 06eb6184

kernel/sched/core.c

+23 −1
Original line number Diff line number Diff line
@@ -5166,6 +5166,28 @@ void sched_show_task(struct task_struct *p) 
	put_task_stack(p);

}



static inline bool

state_filter_match(unsigned long state_filter, struct task_struct *p)

{

	/* no filter, everything matches */

	if (!state_filter)

		return true;



	/* filter, but doesn't match */

	if (!(p->state & state_filter))

		return false;



	/*

	 * When looking for TASK_UNINTERRUPTIBLE skip TASK_IDLE (allows

	 * TASK_KILLABLE).

	 */

	if (state_filter == TASK_UNINTERRUPTIBLE && p->state == TASK_IDLE)

		return false;



	return true;

}





void show_state_filter(unsigned long state_filter)

{

	struct task_struct *g, *p;
@@ -5188,7 +5210,7 @@ void show_state_filter(unsigned long state_filter) 
		 */

		touch_nmi_watchdog();

		touch_all_softlockup_watchdogs();

		if (!state_filter || (p->state & state_filter))

		if (state_filter_match(state_filter, p))

			sched_show_task(p);

	}