Re: [PATCH 2/2] Drivers: hv: Add Hyper-V balloon driver

Avi Kivity
2012-10-10T09:47:42Z

On 10/09/2012 09:44 PM, Andrew Morton wrote:
> On Sun, 7 Oct 2012 16:59:46 -0700
> "K. Y. Srinivasan" <kys@microsoft.com> wrote:
>
>> Add the basic balloon driver.
>
> hm, how many balloon drivers does one kernel need?
>
> Although I see that the great majority of this code is hypervisor-specific.

Much like each network driver is NIC specific.

You could think up a framework into which hypervisor specific balloon
drivers plug in, but you'll find that in each driver 85% of the code is
devoted to talking to the hypervisor, 15% is outdated comments, and the
rest is a call to alloc_pages() and a call to free_pages().

--
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