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Re: [Xen-users] Xen Balooning "Minimum target"

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Xen Balooning "Minimum target"
From: Simon Hobson <linux@xxxxxxxxxxxxxxxx>
Date: Tue, 25 Nov 2008 13:54:34 +0000
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Denny Schierz wrote:

I can set the memory up to 1024M, but if i set the memory to 64M, than i
won't remove the memory in the guest, but xm list shows:

tsles  6    64    1     -b----     24.2

 --long output:

(maxmem 1024)
(memory 64)
(shadow_memory 0)

I believe the way the balloon driver works is simply to 'lock out' the DomU from accessing memory - it can't change the amount of 'physical' memory the client thinks it has available. So when you balloon down, the memory becomes free to the Dom0, but from the DomU, it just looks like it's there but in use.

Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.

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