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Re: [virtio] New virtio balloon...
On Thu, Feb 06, 2014 at 11:58:34AM -0500, Konrad Rzeszutek Wilk wrote:
> On February 6, 2014 8:12:55 AM EST, Daniel Kiper <[email protected]> wrote: [...] >
>Maybe we should not built in any complexity in balloon driver itself. >
>Hence it should be just simple get/put pages from balloon device (with >
>option to hotplug memory in the future). However, host and guest (maybe >
>it should be configured at boot?) should provide knobs (via sysfs, ioctl, > >...?) to drive balloon device/driver. This way anybody could build >
>separate process/module with required logic and policies. There is one but... >
>Such idea was once implemented in Xen by Dan Magenheimer (look for >
>tools/xenballoon in Xen 4.2) but later it was dropped. I do not why. >
>So I am CC-ing Bob and Konrad who may know more about that. >
> Because the xen-self-balloon driver does it and there were no need
> for an userspace tool to do the same thing. OK but why it was decided to move this functionality from userspace to kernel driver? Daniel
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