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[PATCH 0/2] xfs: fix a class of shutdown hangs

To: xfs@xxxxxxxxxxx
Subject: [PATCH 0/2] xfs: fix a class of shutdown hangs
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Fri, 23 Mar 2012 12:47:41 +1100
The shutdown hang these two patches fix was tripped over by RH QA
when some other (unknown) problem resulting in trying to remove an
EFI log item from the AIL when it was not in the AIL at all. The
shutdown was triggered from log IO completion context, and hung
trying to wait for log IO completion.

IOWs, the patches will allow the shutdown to finish and the
filesystem to be unmounted, but do nothing to fix the unknown
problem that caused the shutdown to be triggered.

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