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[PATCH] SysRq-X: show blocked tasks

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Add SysRq-X support: show blocked (TASK_UNINTERRUPTIBLE) tasks only.

Useful for debugging IO stalls.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar
2006-12-06 20:35:59 -08:00
committed by Linus Torvalds
parent 875d95ec9e
commit e59e2ae2c2
3 changed files with 31 additions and 5 deletions
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11
kernel/sched.c
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@@ -4804,7 +4804,7 @@ static void show_task(struct task_struct *p)
show_stack(p, NULL);
}
void show_state(void)
void show_state_filter(unsigned long state_filter)
{
struct task_struct *g, *p;
@@ -4824,11 +4824,16 @@ void show_state(void)
* console might take alot of time:
*/
touch_nmi_watchdog();
show_task(p);
if (p->state & state_filter)
show_task(p);
} while_each_thread(g, p);
read_unlock(&tasklist_lock);
debug_show_all_locks();
/*
* Only show locks if all tasks are dumped:
*/
if (state_filter == -1)
debug_show_all_locks();
}
/**