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[Xen-devel] Re: dom0_mem with 2.6.29-rc8

To: bderzhavets@xxxxxxxxx
Subject: [Xen-devel] Re: dom0_mem with 2.6.29-rc8
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Fri, 20 Mar 2009 12:35:09 -0700
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Boris Derzhavets wrote:
System loaded with grub entry:-

title Xen 3.4 / Ubuntu 8.10, kernel 2.6.29-tip
uuid    9efba9a5-9f2b-4bf6-b8b5-7d6d53eb02d9
kernel  /boot/xen-3.4.gz
module  /boot/vmlinuz-2.6.29-rc8-tip root=/dev/sdb14 ro console=tty0
module  /boot/initrd-2.6.29-rc8-tip.img

seems to allocate required amount of memory for DomUs with no problems.

Yes. Originally dom0_mem was needed to make sure that the dom0 memory didn't overlap the pci window in the physical address space, but that's no longer needed. Ballooning takes care of shrinking dom0 to make space for domUs (though in a dedicated Xen system, starting dom0 with a limited amount of memory to leave a well-defined amount of space for domUs.


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