Re: [Xen-devel] Revised balloon driver

["Mat" <mat@xxxxxxxxx>]

Hi
i'm willing to test it, i think i'm in xen 2.0 and not 2.0-testing.
Is there an easy way to migrate ?
To use the ballon driver, what is needed apart compiling the driver in xen0
and xenU kernel ?

Is there a documentation ?
Couple of weeks ago i've seen a message stating that in order to be able to
shrink/unshrink memory size you have to pass a parameter at xenU kernel at
boot time . What is this parameter, have i misunderstood ?

Mat
On December 2, 5:45 pm Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:
>
> I've checked in a large number of changes to the balloon driver to the
> 2.0-testing and unstable trees. There should now be rather fewer bugs
> and the balloon will play more nicely with other device drivers (by
> which I mean it is less likely to crash the VM).
>
> To see balloon info: cat /proc/xen/balloon
> (I'm happy to receive feedback on the layout/contents. I confused
> myself with it while testing so I guess it may not be very intuitive
> right now :-).
>
> To set memory target: echo <memsz> >/proc/xen/balloon
> (<memsz> is e.g., 300M, 2G, whatever).
>
> NOTE: If you set the memory target too low it is still very easy to
> kill your VM (on 2.6 the OOM killer gets activated). I'm not sure how
> avoidable this is -- for now you'll just have to exercise caution when
> reducing the target below a few 10's of MBs.
>
>  -- Keir
>


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