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

On 8/21/07, Ryan Scott <Ryan.Scott@xxxxxxx> wrote:
> 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.
>

I have changed it to 256 and continued then SXCE just hung. I had to
power off and reboot, and now the xend is marked "maintenance", while
console and domains are marked "offline".

I tried to enable these three, but with no success.

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

What'd be the correct syntax for setting dom0_mem ? I've tried both of
"dom0_mem=512MB" as well as "dom0_mem=524288"

> >
> > 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.
>

For now, this is a single Windows XP instance based on the native
install. This works just fine on my desktop that has 4GB RAM

> -Ryan
>
> >
> > -- Sriram
> > _______________________________________________
> > xen-discuss mailing list
> > xen-discuss@xxxxxxxxxxxxxxx
>
>