This bug report is about systems that are *not* making use of
SCHED_IDLE, which are probably not due to the known scheduler bug.  This
particular error message typically indicates a lock ordering bug or
infinite delay while holding a lock, and can be caused by any kernel
component.

One such case was fixed in version 2.6.26-16:

 * Fix soft lockups caused by one md resync blocking on another due
   to sharing the same device (closes: #514627)

Ben.

Hi,

Unfortunately, this fix did not solve the problem. I booted on the last kernel revision 2.6.26-19-xen yesterday, and it crashed one hour later with the "blocked for more than 120 seconds" message.

I use Xen with a SAN backend (4 FC links / QLogic ISP2432 card) using multipathd. It happens on 54XX and 55XX intel processors ; with or without booting on SAN, and randomly. SADC was the most common process triggering this bug.

If I understand well, it should be related to this bug: #517449 ?

Regards.




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