On 2015/3/21 16:07, linhaifeng wrote: > From: Linhaifeng <haifeng.lin at huawei.com> > > Same as rte_vhost_enqueue_burst we should cast used->idx > to volatile before notify guest. > > Signed-off-by: Linhaifeng <haifeng.lin at huawei.com> > --- > lib/librte_vhost/vhost_rxtx.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c > index 535c7a1..8d674d1 100644 > --- a/lib/librte_vhost/vhost_rxtx.c > +++ b/lib/librte_vhost/vhost_rxtx.c > @@ -722,7 +722,7 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t > queue_id, > } > > rte_compiler_barrier(); > - vq->used->idx += entry_success; > + *(volatile uint16_t *)&vq->used->idx += entry_success; > /* Kick guest if required. */ > if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) > eventfd_write((int)vq->callfd, 1); >
-- Regards, Haifeng
