Re: Having trouble starting more than 8 Xen guests

["Scot P. Floess" <sfloess@xxxxxxxxx>]

Ian,

Hey thanks!  I'll definitely try that...



On Mon, 19 Sep 2011, Ian Forde wrote:

> On Sep 18, 2011, at 9:13, "Scot P. Floess" <sfloess@xxxxxxxxx> wrote:
>
>> I did some google'ing and from what I cn tell that error arises due to the
>> lack of loop back devices (there being 8 by default)...
>>
>> I've tried both using MAKEDEV (in my /etc/rc.local) to create a number of
>> loop back devices and put max_loops in my grub,.conf file.  For example
>> here is what I have in grub.conf now:
>>
>> title CentOS (2.6.18-274.3.1.el5.centos.plusxen)
>>         root (hd0,0)
>>         kernel /xen.gz-2.6.18-274.3.1.el5.centos.plus
>>         module /vmlinuz-2.6.18-274.3.1.el5.centos.plusxen ro root=LABEL=/
>> max_loop=64
>>         module /initrd-2.6.18-274.3.1.el5.centos.plusxen.img
>>
>>
>> Due to wrapping, max_loop is actually on the module /vmlinuz- line...
>>
>> I also tried to put max_loop on the kernel line as well...
>>
>> As I mentioned above, I also created the loop back devices from
>> /etc/rc.local like so:
>>
>> /sbin/MAKEDEV -d /dev -m 64 loop
>>
>> And, once I can log in to the machine, I do see everything in /dev (for
>> example /dev/loop0 to /dev/loop64)
>>
>> Has anyone else had this problem?  If so, how did you resolve it????
>>
>
> Actually, you have max_loops=64 in the wrong file.  You want it in /etc/modprobe.conf as thus:
>
> options loop max_loop=64
>
> Once that is in, a reboot (after shutting down the running VMs) is the quickest way to activate it.  Take the makedev and grub stuff out...
>
>  -I
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Scot P. Floess             RHCT  (Certificate Number 605010084735240)
Chief Architect FlossWare  http://sourceforge.net/projects/flossware
                            http://flossware.sourceforge.net
                            https://github.com/organizations/FlossWare
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