From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH] mm: Avoid livelocking of WB_SYNC_ALL writeback
Date: Fri, 5 Nov 2010 23:30:38 +0100
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Cc: Wu Fengguang <fengguang.wu@intel.com>,
	Christoph Hellwig <hch@lst.de>, linux-fsdevel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>
To: Jan Kara <jack@suse.cz>
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> +	/*
> +	 * In WB_SYNC_ALL mode, we just want to ignore nr_to_write as
> +	 * we need to write everything and livelock avoidance is implemented
> +	 * differently.
> +	 */

I think it would be useful to elaborate here on how livelock avoidance
is supposed to work.