Re: Info request - allocation the dom0_mem for a 1GB RAM laptop

Sriram Narayanan wrote:
> Hello all:
> 
> I've managed to install b66-xen on my Dell Latitude D620 (T7200 - 64
> bit - 1GB RAM).
> 
> On other Dell boxes that have 4 GB of RAM, I didn't have to change
> anything apart from starting the four services as mentioned here :
> http://blogs.sun.com/cwb/entry/starting_out_with_solaris_on
> 
> I was able to succesfully run two XP instances on a core each, and a
> native XP instance on another core on a quad core box.
> 
> On my laptop, however, I have just 1 GB of RAM.
> 
> I have enabled VT in the BIOS. When I attemp to create a domain, xen
> complains something along the lines of "I need 1058698 KiB, but
> dom0_min_mem is 262144 and shrinking to 262144 KiB would leave only
> 235124 KiB free"

What is the "memory" line in your .py file?  1058698 KiB is over 1 GB.

You probably want to tune that down to 512 MB, and let dom0 auto-balloon 
down (or set dom0_mem to 512 MB).

> 
> I tried setting dom0_mem in the grub entry to various numbers.
> However, xm either complains about insufficient memory as above, or
> Solaris freezes, or the laptop just doesn't boot up.
> 
> What should I be reading so that I make better educated configuration
> changes instead of setting values at random ?

Figuring out the memory configuration is not easy.  It depends on what you 
want to run in each domain, and how many virtual domains you want to run on 
a machine.  It's something we're still trying to figure out, so we have not 
written much documentation on it yet.

-Ryan

> 
> -- Sriram
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