From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [LKML] Re: domU is causing misaligned disk writes
Date: Tue, 20 Apr 2010 14:40:38 -0400
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References: <20100420080958.GN5660@tracyreed.org>
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> > Please paste your domU partition table:
> > sfdisk -d /dev/xvda
> > 
> > Are you using filesystems on normal partitions, or LVM in the domU? 
> > I'm pretty sure this is a domU partitioning problem.

.. and you failed to mention how you disk is setup to the guest. Are you
setting it up via phy://dev/ether!d or are tap:aio or
phy://dev/mapper/VG-LV ? Try to make it only via phy:// as that
eliminates the Dom0 cache and any userspace program (blktap) from
being in the picture.