From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joe Thornber <thornber@redhat.com>
Subject: Re: Poor snapshot performance in linux-3.19
Date: Fri, 29 May 2015 16:29:37 +0100
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On Fri, May 29, 2015 at 11:03:28AM +0800, Dennis Yang wrote:
> The server I have tested is equipped with Xeon E3-1246 with 4 physical
> cores, so I think CPU might not be the bottleneck of the storage
> throughput.
> Any idea?

Is it any better with this patch?

https://github.com/jthornber/linux-2.6/commit/56db3d227ea7e11e42b2b67f8ddc9f6d40c3a3a4