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RE: [Xen-devel] accessing a char device in xenU

To: "Matthieu PATOU" <matthieu.patou@xxxxxxxxx>, "Xen Devel" <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] accessing a char device in xenU
From: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date: Fri, 28 Jan 2005 08:06:00 -0000
Delivery-date: Fri, 28 Jan 2005 08:18:57 +0000
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Thread-topic: [Xen-devel] accessing a char device in xenU
> Hi
> is it possible to access a char device in xenU ?
> More precisly i have i tape device in a server and i want to 
> share it across
> my different xenU domains.

No, there's no generic mechanism for sharing char devices. The way in
which it makes sense to multiplex devices between domains is typically
very device-secific:

With a dvice like a tape you'd presumably only want to let one domain
access it at a time, perhaps with a hard interlock as to which tape is
in the drive. Fortunately, the bandwidth is pretty low, so it's probably
easiest to setup a network based soloution rather than doing something
Xen specific. I presume such daemons already exist (?)

Ian



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