Re: [PATCH v3 2/3] virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Mar 02, 2018 at 04:47:29PM +0800, Wei Wang wrote:
> diff --git a/include/sysemu/balloon.h b/include/sysemu/balloon.h
> index af49e19..16a2aae 100644
> --- a/include/sysemu/balloon.h
> +++ b/include/sysemu/balloon.h

...

> +typedef void (QEMUBalloonFreePageStart)(void *opaque);
> +typedef void (QEMUBalloonFreePageStop)(void *opaque);

So I think the rule is that no bitmap sync must happen
between these two, otherwise a hint might arrive and
override the sync output.

Should be documented I think.

-- 
MST