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[Xen-users] allocating memory to dom0

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] allocating memory to dom0
From: "john maclean" <jayeola@xxxxxxxxx>
Date: Thu, 19 Oct 2006 22:43:43 +0100
Delivery-date: Thu, 19 Oct 2006 14:45:10 -0700
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Hey chaps, having a minor dispute with a friend. According the README
in the Xen sources....
"
  The Xen command line takes a number of optional arguments described
  in the manual. The most common is 'dom0_mem=xxxM' which sets the
  amount of memory to allocate for use by your initial virtual
  machine (known as domain 0). Note that Xen itself reserves about
  32MB memory for internal use, which is not available for allocation
  to virtual machines.
.."

I've taken this to mean that one allocates say, half of one's RAM to
dom0 with the command `dom0_mem=xxxM`. The domUs will then use up to
the other half of the box's RAM. Is this correct?

My buddy says that this is unnecessary as the dom0 only needs 32M of
ram. It will give the RAM away to the domU chaps until it has no more
RAM to spare.

--
John Maclean  - 07739 171 531
MSc (DIC)

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