linux-kernel - Re: [LKML] Re: [Xen-devel] domU is causing misaligned disk writes

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Message-ID: <20100420225823.GX5660@tracyreed.org>
Date:	Tue, 20 Apr 2010 15:58:23 -0700
From:	Tracy Reed <treed@...raviolet.org>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	Pasi Kärkkäinen <pasik@....fi>,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org,
	Aoetools-discuss@...ts.sourceforge.net
Subject: Re: [LKML] Re: [Xen-devel] domU is causing misaligned disk writes

On Tue, Apr 20, 2010 at 02:40:38PM -0400, Konrad Rzeszutek Wilk spake thusly:
> .. 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.

Disk is set up like so:

disk = [ "phy:/dev/etherd/e1.28,xvde,w",
         "phy:/dev/etherd/e2.28,xvdf,w",
         "phy:/dev/etherd/e3.1,xvdc,w",
         "phy:/dev/etherd/e4.1,xvdd,w",
         "phy:/dev/etherd/e6.1,xvdg,w",
         "phy:/dev/etherd/e6.2,xvdh,w" ]


-- 
Tracy Reed
http://tracyreed.org

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