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Your kernel and initrd are compressed and still exceed 512MB? That is very unusual. Are you building everything in your dom0 kernel? (e.g. answering yes to all drivers, and everything when configuring your kernel?) If so, that’s not a good idea and is likely contributing to your problem.

You didn’t say how much memory is in your machine. If you have enough, you can try dom0_mem=768M or dom0_mem=1GB and so on.

If those suggestions don’t work, sorry, maybe someone else can answer but this is probably a xen-users list question than a xen-devel question.

From: ccmail111 [mailto:ccmail111@xxxxxxxxx]
Sent: Friday, March 19, 2010 5:47 PM
To: xen-devel@xxxxxxxxxxxxxxxxxxx; Dan Magenheimer
Subject: RE: [Xen-devel] Fw: Not enough RAM for domain 0 allocation

Hi Dan,

Thanks for response.

I just tried (with dom0_mem=512M) and see error:

"Domain 0 allocation is too small for kernel image"

But if I dont use the parameter I see error as in subject line which is different.

Question is: does subject line error printed by kernel ? Any kernel parameter that I need to change during build ?

Any suggestions ?

Is there anyway I can specifiy the max for kernel and xen ?

Thanks,

--- On Fri, 3/19/10, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> wrote:

From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Subject: RE: [Xen-devel] Fw: Not enough RAM for domain 0 allocation
To: "ccmail111" <ccmail111@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
Date: Friday, March 19, 2010, 6:10 PM

You should be able to get around this problem by specifying dom0_mem= on the Xen boot line, e.g.:

kernel /boot/xen.gz noreboot loglvl=all dom0_mem=256M

From: ccmail111 [mailto:ccmail111@xxxxxxxxx]
Sent: Friday, March 19, 2010 3:43 PM
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] Fw: Not enough RAM for domain 0 allocation

--- On Fri, 3/19/10, ccmail111 <ccmail111@xxxxxxxxx> wrote:

From: ccmail111 <ccmail111@xxxxxxxxx>
Subject: Not enough RAM for domain 0 allocation
To: "Fajar A. Nugraha" <fajar@xxxxxxxxx>
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Date: Friday, March 19, 2010, 5:38 PM

Hi,

I see above error when xen tries to boot up.

The grub.conf is:

title Dom0 Xen 3.4.2 XenLinux 2.6
       kernel /boot/xen.gz noreboot loglvl=all
       module /boot/vmlinuz.vm root=dev/ram0 ro
       module /boot/ramdisk.gz

Looking through archives I found couple of pointers but no solution.

The closest I see:

http://www.mailinglistarchive.com/xen-devel@xxxxxxxxxxxxxxxxxxx/msg56592.html

by Keir:

" Either this restriction of the domain builder needs
to be lifted (a bit of a pain and not really on anyone's todo list), ..."

Any solutions/suggestions is appreciated !

Thanks !