On Fri, Sep 05, 2014 at 11:23:22AM -0700, K. Y. Srinivasan wrote: > This is a win8 feature that has been implemented. Turn on the feature bit > to enable the feature. What does those two sentances even mean? > With this feature turned on, What is "this"? > when the host is waiting > for space to become available on the ringbuffer (host to guest), the guest > will interrupt the host when space becomes available (as part of draining > the ring buffer). > > Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> > --- > drivers/hv/ring_buffer.c | 5 +++++ > 1 files changed, 5 insertions(+), 0 deletions(-) > > diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c > index 15db66b..6361d12 100644 > --- a/drivers/hv/ring_buffer.c > +++ b/drivers/hv/ring_buffer.c > @@ -361,6 +361,11 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, > ring_info->ring_buffer->read_index = > ring_info->ring_buffer->write_index = 0; > > + /* > + * Set the feature bit for enabling flow control. > + */ > + ring_info->ring_buffer->feature_bits.value = 1; What happens if you are running on an old system that doesn't support this new "feature"? thanks, greg k-h _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
