Have you checked on the server when this deadlock happened?

From my experience, you will get a trace for the warning.

2015-08-10 16:51 GMT+02:00 Stefan Priebe [off-list ref]:

Am 03.08.2015 um 08:25 schrieb Stefan Priebe - Profihost AG:

quoted

Am 03.08.2015 um 08:21 schrieb Ming Lin:

quoted

On Fri, Jul 31, 2015 at 11:08 PM, Stefan Priebe [off-list ref]
wrote:

quoted

Hi,

any ideas about this deadlock:
2015-08-01 00:05:05     "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs"
disables this message.
2015-08-01 00:05:05     Tainted: G O 3.18.19+47-ph #1
2015-08-01 00:05:05     INFO: task xfsaild/bcache5:2437 blocked for more
than 120 seconds.

No backtrace?

Yes, no backtrace.

Any chance or idea to fix this? This happens every day at a different server
and is really annoying.


Stefan
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