Re: [Xen-users] max loop xen 3.0.4

[Olivier Le Cam <Olivier.LeCam@xxxxxxxxxxxxxxxxxxxxx>]

Hi Franck,

> i've installed a new server with ubuntu 6.06.1 LTS and xen 3.0.4 (32 bit
> PAE SMP from http://www.xensource.com/download/dl_304tarballs.html)
>
> Boot work fine but i've a little problem with max loop.
> I've put max loop in /boot/grub/menu.lst but DMESG say only 8 loop :(
>
> title Xen 3.0.4 / XenLinux 2.6
> root            (hd0,0)
> kernel          /xen-3.gz dom0_mem=131072 max_loop=128
> module          /vmlinuz-2.6-xen root=/dev/md1 ro console=tty0 vga=0x316
> watchdog
> module          /initrd.img-2.6.16-xen
Put the max_look directive rather on the first module line:

module /vmlinuz-2.6-xen [...] vga=0x316 max_loop=128

It will be perhaps necessary to create the files /dev/loop<n>. If so, 
modify /dev/MAKEDEV in order to create them:
Replace:

  loop)
                for part in 0 1 2 3 4 5 6 7
                do
                        makedev loop$part b 7 $part $disk
                done
                ;;

By:

        loop)
                for part in `seq 0 63`  # change 63 to (max_loop - 1)
                do
                        makedev loop$part b 7 $part $disk
                done
                ;;

Then, "cd /dev ; ./MAKEDEV loop".

NB: I don't know for ubuntu but some distros can not handle more than 96 
loops.
BTW, I strongly suggest to use LVM rather than FS image files if you 
have the intention to manage several DomUs in an production environment.
HTH

Regards,
--
Olivier Le Cam
Département des Technologies de l'Information et de la Communication
CRDP de l'académie de Versailles

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