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authorIngo Molnar <mingo@elte.hu>2006-12-06 20:35:59 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:32 -0800
commite59e2ae2c29700117a54e85c106017c24837119f (patch)
treed746e90d2d79fa8458d021d3572bc55ebdc3aca3 /kernel
parent875d95ec9eb69ffb334116fb44d04d9a64dcbfbb (diff)
downloadop-kernel-dev-e59e2ae2c29700117a54e85c106017c24837119f.zip
op-kernel-dev-e59e2ae2c29700117a54e85c106017c24837119f.tar.gz
[PATCH] SysRq-X: show blocked tasks
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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 12fdbef..1848e28 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -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();
}
/**
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