From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?ISO-8859-1?Q?Roger_Pau_Monn=E9?= <roger.pau@citrix.com>
Subject: Re: 4.2.1: Poor write performance for DomU.
Date: Fri, 8 Mar 2013 10:43:24 +0100
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To: Steven Haigh <netwiz@crc.id.au>
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On 08/03/13 09:54, Steven Haigh wrote:
> Just wondering if there is any further news or tests that I might be
> able to do on this?

I have been working on speed improvements for blkfront/blkback, and
submitted the first RFC series of patches last week, which can be found
at http://thread.gmane.org/gmane.linux.kernel/1448584. This is still a
WIP, so if you want to test them please be aware there might be hidden
bugs. I've also pushed them to a branch in my git repo:

git://xenbits.xen.org/people/royger/linux.git xen-block-indirect

You will need to recompile both the Dom0/DomU kernels (if they are not
the same) if you want to test them.