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Subject: Re: [PATCH 2/5] writeback: dirty position control
From: Peter Zijlstra <peterz@infradead.org>
To: Wu Fengguang <fengguang.wu@intel.com>
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Date: Mon, 08 Aug 2011 16:31:49 +0200
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On Mon, 2011-08-08 at 22:11 +0800, Wu Fengguang wrote:
> It's actually dead code because (origin < limit) should never happen.
> I feel so good being able to drop 5 more lines of code :) 

OK, but that leaves me trying to figure out what origin is, and why its
4 * thresh.

I'm having a horrible time understanding this stuff.