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[PATCH 0/2] Fix a couple of random hangs.

To: xfs@xxxxxxxxxxx
Subject: [PATCH 0/2] Fix a couple of random hangs.
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Sun, 15 Mar 2009 22:40:41 +1100
The first patch fixes a low memory hang where I/O completion
processing triggers memory reclaim which hangs waiting for
I/O completion. The trigger is unwritten extent conversion
blocking completion of normal writes.

The second fixes a log hang which results from excessive load;
we update the push target after we go to sleep so if we are
unlucky enough not to have a current push target far enough
advanced we'll hang.

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