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xen-devel
RE: [Xen-devel] Can't get a VM to use more than ~900M
Thanks Luciano and Ian - I was just being a bonehead....
Working now... 3GB virtual machine.
Josh
-----Original Message-----
From: Luciano Miguel Ferreira Rocha [mailto:strange@xxxxxxxxxxxxx]
Sent: Wednesday, December 15, 2004 11:28 AM
To: Goldenhar, Josh
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Can't get a VM to use more than ~900M
On Wed, Dec 15, 2004 at 10:47:44AM -0800, Goldenhar, Josh wrote:
> Hey all - sorry for any formatting errors, I'm using MS Outlook In a
> new job here - I'm as ashamed as you are shocked... ;-)
>
> I've looked through the archive and haven't spotted an answer to this,
> it's driving me a little buggy.
>
> I have an HP DL360 G3 - 2x 2.8GHz Xeons with 4.5GB of RAM.
> I'm running the precompiled 2.0.1 Xen you can download. I'm Aware I
> can only make use of up to 4GB total.
>
> The dom0 kernel, or the domU kernel only seems to address about
> 900MB (per top, /proc/meminfo: MemTotal: 904312 kB)
> Regardless of what I set it to. I have one instance of a VM set up
> With 2GB or RAM:
> Name Id Mem(MB) CPU State Time(s) Console
> Domain-0 0 507 0 r---- 91.4
> ObidosTest 1 2047 1 r---- 978.2 9601
>
> Were you can see that ObidosTest has been started with 2048MB But cat
> /proc/xen/memory_target reveals 939524096
>
> When I've modified grub.conf mem_dom0= line to anything over 900MB It
> also tops out at 900MB.
>
> Xm baloon commands don't seem to make a difference either...
>
> Help?
The dom-U kernel may not have been compiled with support for > 1GB of memory.
Get the xen source, compile, and run:
make -C linux-2.6.9-xenU ARCH=xen menuconfig
Go to:
X86 Processor Configuration
--> High Memory Support
and choose 4GB
Recompile, and the kernel and its modules should be in dist/install
Regards,
Luciano Rocha
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