Re: Re: [Xen-devel] Balloon driver for Linux/HVM

[Daniel Kiper <dkiper@xxxxxxxxxxxx>]

Hello,

On Wed, Nov 17, 2010 at 07:50:18PM +0800, Chu Rui wrote:
> You are right, so balloon is an important tool to adjust the capacity of the
> buffer caches among the guests. But balloon is usually criticized for its
> long reactive time. Would you please tell me how slow it is? Can we
> temporarily suspend the guest when the balloon deflating speed is not as far
> as required?
> Furthermore, with HVM, the balloon does not work when the guest is short of
> memory and swapping, even the host has a lot of surplus at that time.
> Besides promise a large size to the booting guest, it there any better way?

Yes, it is - memory hotplug. Now it is under development. Currently,
I am waiting for some comments for new version of patch. I will make
it public when I receive those reviews.

Daniel

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