On Tue, Jan 08, 2019 at 12:50:04PM +0800, Wei Wang wrote:
There is no need to update the balloon actual register when there is no ballooning request. This patch avoids update_balloon_size when diff is 0.
Signed-off-by: Wei Wang wei.w.wang@intel.com Reviewed-by: Cornelia Huck cohuck@redhat.com Reviewed-by: Halil Pasic pasic@linux.ibm.com Tested-by: Christian Borntraeger borntraeger@de.ibm.com
drivers/virtio/virtio_balloon.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 45d32f5..d48c12c 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -457,9 +457,12 @@ static void update_balloon_size_func(struct work_struct *work) update_balloon_size_work); diff = towards_target(vb);
- if (!diff)
return;- if (diff > 0) diff -= fill_balloon(vb, diff);
- else if (diff < 0)
- else diff += leak_balloon(vb, -diff); update_balloon_size(vb);
2.7.4
<formletter>
This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html for how to do this properly.
</formletter>