From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH v3 COLOPre 21/26] tools/libxl: refactor
 write stream to support back channel
Date: Tue, 30 Jun 2015 11:28:25 +0100
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To: Yang Hongyang <yanghy@cn.fujitsu.com>
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On Thu, 2015-06-25 at 14:25 +0800, Yang Hongyang wrote:
> From: Wen Congyang <wency@cn.fujitsu.com>

Refactor how?

(Tip: In general no change can be sufficiently described in just the
subject line unless it is absolutely the most trivial possible one).

It looks like mostly checkpoint_callback is renamed to
write_records_callback and the type of its argument and that of
completion_callback changed. But why?