[dm-devel] Poor snapshot performance in linux-3.19

[Joe Thornber]

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