Re: [Xen-devel] Dom0 memory size is persistent?

Matsumoto
2005-11-30T07:52:22Z

Hi, all

I have the same problem.
The following is additional infomation.

>I can change Dom0 memory size by setting dom0_mem in grub/menu.lstand
reboot.
>However, when I start xend, Dom0 memory size is reset to the
>previous size (yes, the memory size BEFORE reboot).

I tried to test it.
The result is :

　1.rm /var/lib/xenstored/tdb
　2.setting dom0_mem=262144, and reboot
　3.At this time, "xm list" show Dom0 is 256MB.
　4.setting dom0_mem=524288, and dom0 is rebooted.
　5.BUT "xm list" remain in 256MB.

　1.rm /var/lib/xenstored/tdb
　2.setting dom0_mem=262144, and reboot
　3.At this time, "xm list" show Dom0 is 256MB.
　4.rm /var/lib/xenstored/tdb
　5.setting dom0_mem=524288, and dom0 is rebooted.
　6.YES "xm list" show Dom0 is 512MB.

I think tdb should be re-create every time dom0 is started.
Am I correct?

Sincerely Yours,
Nakato

On Wed, 30 Nov 2005 07:54:02 +0900
"Yoshi. Oguchi" <y-oguchi@jp.fujitsu.com> wrote:

> Hi,
>
> I''m having a problem with increasing dom0 memory size.
>
> I can change Dom0 memory size by setting dom0_mem in grub/menu.lst
> and reboot.
> However, when I start xend, Dom0 memory size is reset to the
> previous size (yes, the memory size BEFORE reboot).
>
> It seems when xend starts and xenstored is initialized,
> the balloon driver adjusts Dom0 memory to the previous size
> recorded in xenstored entry
> (/local/domain/0/memory/target @ /var/lib/xenstored/tdb).
>
> Should this entry be initialized at Dom0 boot?
>
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