Re: [Xen-devel] Fw: Not enough RAM for domain 0 allocation

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Mar 19, 2010 at 11:37:34PM -0700, ccmail111 wrote:
> Thanks Dan.
> I am past that and see different error now:
> 
> "Xen: Scrubbing Free RAM ............"
> Then the xterm(screen) goes blank..
> 
> Any thoughts ?
>

This is when Xen boots/starts the dom0 Linux kernel.
It sounds like your dom0 kernel console settings (cmdline parameters)
are not correct.

-- Pasi
 
> SV
> --- 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, 9:16 PM
> 
>   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, 
> thatâ**s
>   not a good idea and is likely contributing to your problem.
> 
> 
> 
>   You didnâ**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 donâ**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,
> 
> 
> 
>   SV
> 
> 
> 
>   --- 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:
> 
>   
> [1]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 !
> 
> 
> 
>   SV
> 
> 
> 
> 
> 
> 
> 
> 
> 
> References
> 
>    Visible links
>    1. 
> http://www.mailinglistarchive.com/xen-devel@xxxxxxxxxxxxxxxxxxx/msg56592.html

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> http://lists.xensource.com/xen-devel


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