Re: [RFC PATCH 3/4] virtio_balloon: add pressure notification via anew virtqueue

From: Luiz Capitulino
Date: Thu Jan 16 2014 - 20:44:02 EST

On Thu, 16 Jan 2014 20:38:19 -0500
Luiz Capitulino <lcapitulino@xxxxxxxxxx> wrote:

> > What does qemu do with this information?
> There are two possible scenarios:
> 1. The balloon driver is currently inflating when it gets under
> pressure
> QEMU resets "num_pages" to the current balloon size. This
> cancels the on-going inflate
> 2. The balloon driver is not inflating, eg. it's possibly sleeping
> QEMU issues a deflate
> But note that those scenarios are not supposed to be used with the
> current device, they are part of the automatic ballooning feature.
> I CC'ed you on the QEMU patch, you can find it here case you didn't
> see it:

By "current device" I meant "outside of automatic ballooning scope".
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