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virtio: update balloon size in balloon "probe"

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The following commit 'fad7b7b27b6a (virtio_balloon: Use a workqueue
instead of "vballoon" kthread)' has added a regression. Original code with
kthread starts the thread inside probe and checks the necessity to update
balloon inside the thread immediately.

Nowadays the code behaves differently. Work is queued only on the first
command from the host after the negotiation. Thus there is a window
especially at the guest startup or the module reloading when the balloon
size is not updated until the notification from the host.

This patch adds balloon size check at the end of the probe to match
original behaviour.

Signed-off-by: Konstantin Neumoin <kneumoin@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Konstantin Neumoin 2016-09-29 13:17:12 +03:00 committed by Michael S. Tsirkin
parent 0ea1e4a6d9
commit 8424af5336
1 changed files with 2 additions and 0 deletions
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2
drivers/virtio/virtio_balloon.c
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@ -577,6 +577,8 @@ static int virtballoon_probe(struct virtio_device *vdev)
virtio_device_ready(vdev);
if (towards_target(vb))
virtballoon_changed(vdev);
return 0;
out_del_vqs: