On Wed, 24 Jul 2019 22:03:15 -0700 "Himadri Pandya" <himadrispan...@gmail.com> wrote:
> VMbus ring buffers are sized based on the 4K page size used by > Hyper-V. The Linux guest page size may not be 4K on all architectures > so use the Hyper-V page size to specify the ring buffer size. > > Signed-off-by: Himadri Pandya <himadri18...@gmail.com> > --- > drivers/hv/hv_util.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c > index c2c08f26bd5f..766bd8457346 100644 > --- a/drivers/hv/hv_util.c > +++ b/drivers/hv/hv_util.c > @@ -413,8 +413,9 @@ static int util_probe(struct hv_device *dev, > > hv_set_drvdata(dev, srv); > > - ret = vmbus_open(dev->channel, 4 * PAGE_SIZE, 4 * PAGE_SIZE, NULL, > 0, > - srv->util_cb, dev->channel); > + ret = vmbus_open(dev->channel, 4 * HV_HYP_PAGE_SIZE, > + 4 * HV_HYP_PAGE_SIZE, NULL, 0, srv->util_cb, > + dev->channel); > if (ret) > goto error; > hv_util doesn't need lots of buffering. Why not define a fixed value across all architectures. Maybe with some roundup to HV_HYP_PAGE_SIZE.
