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

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
......@@ -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);
}
......
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