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Date: Fri, 1 Jan 2016 12:13:48 +0200
From: "Michael S. Tsirkin" <mst@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Petr Mladek <pmladek@...e.com>,
virtualization@...ts.linux-foundation.org,
Jeff Epler <jepler@...ythonic.net>, Tejun Heo <tj@...nel.org>,
Jiri Kosina <jkosina@...e.cz>
Subject: [PATCH RFC] virtio_balloon: refill by config handler
Peter Mladek reported that balloon might never refill completely after
restore. This is because fill_balloon is only called once there.
Calling fill_balloon repeatedly seems too aggressive,
especially in light of the fact that it sleeps on failure: let's
wake the config change handler and fill it asynchronously.
Reported-by: Petr Mladek <pmladek@...e.com>
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
I was unable to test this - for some reason my test VM
doesn't resume (with or without the patch).
Petr, does this work for you?
drivers/virtio/virtio_balloon.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 7efc329..ee29473 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -589,7 +589,7 @@ static int virtballoon_restore(struct virtio_device *vdev)
virtio_device_ready(vdev);
- fill_balloon(vb, towards_target(vb));
+ wake_up(&vb->config_change);
update_balloon_size(vb);
return 0;
}
--
MST
--
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