There's the hung_task_panic sysctl, but that's a bit an extreme measure.
As a fallback taint at least the machine.
Our CI uses this to decide when a reboot is necessary, plus to figure
out whether the kernel is still happy.
Signed-off-by: Daniel Vetter <daniel.vet...@intel.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp>
Cc: Dmitry Vyukov <dvyu...@google.com>
Cc: "Paul E. McKenney" <paul...@linux.ibm.com>
Cc: Valdis Kletnieks <valdis.kletni...@vt.edu>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
Cc: Vitaly Kuznetsov <vkuzn...@redhat.com>
Cc: "Liu, Chuansheng" <chuansheng....@intel.com>
---
kernel/hung_task.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index f108a95882c6..7fae16f1b49c 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -203,6 +203,8 @@ static void check_hung_uninterruptible_tasks(unsigned long
timeout)
if (hung_task_call_panic) {
trigger_all_cpu_backtrace();
panic("hung_task: blocked tasks");
+ } else {
+ add_taint(TAINT_WARN, LOCKDEP_STILL_OK);
}
}
--
2.20.1
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