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Date: Thu, 5 Sep 2002 20:26:52 +0100
From: Christoph Hellwig <hch@infradead.org>
To: Andrea Arcangeli <andrea@suse.de>, linux-kernel@vger.kernel.org,
       lord@sgi.com
Subject: Re: 2.4.20pre5aa1
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On Thu, Sep 05, 2002 at 08:15:30PM +0100, Christoph Hellwig wrote:
> Won't happen:
> 
> 
> 					O_DIRECT write starts
> 					+ takes XFS iolock exclusive
> 					- invalidates pagecache
> 					+ downgrades iolock to shared
> 					- perform write
> 
> 	xfs_setattr for truncate called
> 	+ takes XFS iolock shared

			^^^ exclusive ^^^

> 	  -> blocks
> 
> 					- write i_size to something
> 					+ releases iolock
> 	  -> gets woken
> 
> -
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