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Since virtio-ccw doesn't work with accessing to the config registers inside an interrupt context, this patch series avoids that issue by moving the config register accesses to the related workqueue contexts. Wei Wang (2): virtio-balloon: tweak config_changed implementation virtio-balloon: improve update_balloon_size_func drivers/virtio/virtio_balloon.c | 59

...ei Wang <wei.w.wang at intel.com> > --- > drivers/virtio/virtio_balloon.c | 54 ++++++++++++++++++++--------------------- > 1 file changed, 26 insertions(+), 28 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index 728ecd1..9a82a11 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -394,33 +394,15 @@ static void virtballoon_changed(struct virtio_device *vdev) > { > struct virtio_balloon *vb = vdev->priv; > unsigned long flags; > - s64 diff = towards_target(...

...ue contexts. Signed-off-by: Wei Wang <wei.w.wang at intel.com> --- drivers/virtio/virtio_balloon.c | 54 ++++++++++++++++++++--------------------- 1 file changed, 26 insertions(+), 28 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 728ecd1..9a82a11 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -394,33 +394,15 @@ static void virtballoon_changed(struct virtio_device *vdev) { struct virtio_balloon *vb = vdev->priv; unsigned long flags; - s64 diff = towards_target(vb); - - if (diff) { - spin_lock_i...

...equest. This patch avoids update_balloon_size when diff is 0. Signed-off-by: Wei Wang <wei.w.wang at intel.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 9a82a11..4884b85 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -435,9 +435,12 @@ 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 -= fil...